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Excelsior!note 

"A kid's place is exploring space!"

Ready Jet Go! is an Edutainment Show that currently airs on PBS Kids in the United States, and was created by Craig Bartlett (whose works include Hey Arnold! and Dinosaur Train). It made its television debut on February 15, 2016, and is aimed at kids ages 3-8. The series is produced by Wind Dancer Films and Snee Oosh, Inc, in cooperation with NASA's Jet Propulsion Laboratory.

A Cheerful Child, ace, and all around good guy named Jet Propulsion and his quirky family are from the fictional planet Bortron 7 which orbits around a Red dwarf called Bortron. They live at Boxwood Terrace in Washington, where they study human customs and Earth environments for a travel guide. They came upon Earth when they were looking for new life-friendly planets to visit and write more stories about, when they picked up a radio signal, which had a rather catchy tune. And so, the Propulsions figured that the Earthies would still be there, and have a good sense of rhythm, so they decided to move to Earth to learn more about it.

Due to being an alien, and being the most interesting kid ever, Jet has become popular in the town of Boxwood Terrace and has formed a friendship group with the neighbor kids, appointing himself as the leader of the group with little complain from the others. His friends are the Black Best Friend Sydney, who is a huge science fiction geek and Nice Girl with a great imagination and idolizes a fictional character named Commander Cressida, the 4 year old Little Miss Snarker Mindy, who is hilariously snarky and is Constantly Curious, often asking the questions that lead the episode's plots, and even though she cannot go into space with the older kids yet, she is still treated as an equal and never talked down to, and the Nervous Wreck Sean, a Child Prodigy who is practical, easily nervous, and dreams of leading the first human mission to Mars, but, gets space-sick easily, is afraid of heights, and has claustrophobia, while also having panic attacks. And even better, the Propulsions' car turns into a flying saucer, which they frequently use to take the other kids into space.

Their alien identities are known to Sean, Mindy, and Sydney, but they otherwise make some effort to conceal their origin. Unfortunately for the Propulsions, they have a difficult time keeping their alien identities secret, having almost exposed their identities several times throughout the series, though they always manage to keep it a secret anyway. The only characters who have likely chances of knowing are Sean's mother, a DSA scientist who was informed by Jet about his origins, but luckily dismisses it as "imagination", and the resident Kid Detective Mitchell Peterson, who can either be vain, quiet and obedient, or both. He, for unknown reasons, constantly spies on Jet, and even tried to expose his secret alien identity in front of the whole town, which failed, twice.

At the end of each episode, scientist Amy Mainzer (also called Astronomer Amy) hosts educational interstitial segments: the segments are not included in the export version.The educational mission of the series is to build on children’s curiosity about astronomy and earth science, telling stories that feature characters learning about space in a way that is accessible to children.

Before appearing on television, Ready Jet Go was leaked on the PBS Kids video app. As a result, Ready Jet Go! has received critical acclaim, a million streams online, and the highest ratings on PBS Kids, including 7.6 million kids on linear television. Ready Jet Go has an app called Space Explorer. The App was featured as ‘Best New App’ on the front page of the US App Store and hit #1 free app in Kids and #2 free app in Education. In August 2016, Ready Jet Go was renewed for a second season, which premiered on April 2, 2018. In it, Mindy turns five and gets to go to space.

Ready Jet Go! also now has a Best Episode Crowner, so if you'd like to make your choice for the best episode of the series known, now's your chance.


Ready, Jet, TROPES!:

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    Tropes A to M 
  • Abhorrent Admirer: Mindy seems to like Mitchell, though he is mean to her and doesn't like her back.
    • This is later averted in the episode "Detective Mindy", where Mitchell declares Mindy his detective partner and they become friends.
  • Absentee Actor: Mindy was absent in "Beep has the Blues", " A Visit to the Planetarium", "Asteroids, Meteors, and Meteorites", "Tiny Blue Dot", "Earth Camping", "What's a Satellite?", "Space Junk", "Beep and Boop's Game", "Sunday Drive", "Whole Lotta Shakin'", "My Fair Jet", "Space Race", "Sean's Neptune Tune", "Castaway Carrot", "Not a Sound", "A Hammer and a Feather", and "Commander Mom".
    • Sean and Sydney were both absent in "Earth Camping", "Sunday Drive", and "Castaway Carrot".
    • Celery was absent in "Backyard Moon Base", "Mindy's Moon Bounce House", "Visit to Mom's Office", "A Visit to the Planetarium", "What Goes Up...", "Asteroid Patrol", "Treehouse Space Station", "Earth Camping", "Satellite Selfie", "Scientific Sean", "Beep and Boop's Game", "Constellation Prize", "Total Eclipse of the Sunspot", "Sean's Year in Space", "Lone Star", "Jet's Time Machine", "Commander Mom", "Jet Shrinks the Kids", "Measure for Measure", "Mindy and Carrot Bake", and "Eye in the Sky".
    • Carrot was absent in "Mindy's Moon Bounce House", "Beep Has the Blues", "Visit to Mom's Office", "Mission to Mars", "A Visit to the Planetarium", "Ice Moon Enceladus", "What Goes Up...", "Asteroid Patrol", "Treehouse Space Station", "Face on the Fritz", "Sunspot and the Great Red Spot", "Detective Mindy", "Satellite Selfie", "Beep and Boop's Game", "Total Eclipse of the Sunspot", "Sean's Year in Space", "Whole Lotta Shakin'", "The Mindysphere", "Lone Star", "Space Race", "Sean's Neptune Tune", "Not a Sound", "From Pluto With Love", "Commander Mom", "Mindy Turns Five", "Jet Shrinks the Kids", "Measure for Measure", "Commander Cressida Begins", and "Eye in the Sky".
  • Accidental Pervert: Sunspot in "Satellite Selfie", where he tries to take a picture of Jet's house from above but ends up taking a picture of Mr. Peterson's butt.
  • Accidental Pun: Carrot and Celery think their names are "Earth" names. They were probably going for Garrett and Sally, respectively. Uncle Zucchini was most likely going for Zachary.
  • The Ace: Jet. He can stretch his body, is really tall, adorkable, smart, and the leader of his gang.
  • Acquired Situational Narcissism: In "Not a Sound", Sean already knows that there is no sound in space, yet Jet and Sydney are convinced that there is sound in space. Sean uses this as an opportunity to look smart and rub the fact that they're wrong in Jet and Sydney's faces.
  • Acting for Two: Several In-Universe examples.
    • In "Lone Star", Sydney tells the other kids about the legend of Lone Star, and they imagine themselves as people in the story. Sydney plays both one of the townspeople and the town's only science teacher.
    • In "Holidays in Boxwood Terrace", Mindy plays both the Head Elf and the Head Scientist in the Christmas pageant.
    • In "A Star is Born", Jet plays both hydrogen and helium in the kids' movie about the formation of a star.
  • Action Girl: Commander Cressida.
  • Acrofatic: Despite Sean's weight, he was able to do a perfect somersault over Jet's aunt, Eggplant in "Back to Bortron 7".
  • A Day in the Limelight: "Commander Cressida Begins" mostly revolves around Sydney and Mindy. Jet and Sean do appear, but they have non-speaking cameos.
  • Ad-Break Double-Take: A variant occurs in TV broadcasts of the two-parter, "Mindy Turns Five".note  At the end of Part One, Mindy says "This is one small step for Mindy, and one giant leap for Stuffy Bear!" and she steps on the camera. At the beginning of Part Two, Mindy says it again and her stepping on the camera is accompanied with puff effects and the other kids cheering.
  • Added Alliterative Appeal: In "Earth Camping", Carrot and Jet go through their packing list, which consists of pickle juice, a ping pong paddle, and a pocket protector. It turns out, that their "packing list" was the "P" section of the dictionary!
  • Adorably Precocious Child: All the kids count as this, especially Mitchell, who is about Mindy's age and can make an exact copy of Saturn V.
  • Adorkable: Jet, his dad, Sean, and Mitchell.
    • In a way, Dr. Skelley is this trope due to still being an avid fan of the Commander Cressida franchise.
  • Adult Fear: In "Back to Bortron 7", Eggplant informs Carrot and Celery that once they finish their presentation, they can never go back to Earth. Keep in mind that the Propulsions brought Sean and Sydney to Bortron 7 while their parents were out of town. Imagine your children being stranded on a planet thousands of lightyears away from Earth, taken by a crazy alien family, never to return ever. Luckily, Carrot and Celery's boss allows them to stay on Earth, so they get to return to Earth with their parents none the wiser.
    • In "My Fair Jet", the DSA weather balloon gets away in some nasty weather. Sean tries to grab it, but it ends up carrying it with him. You can tell by the expression on Dr. Rafferty's face that she is traumatized by her son flying away. Even Sydney was distraught. She pretty much begged Jet to forget his "Earthie" training just so he can save Sean.
  • Aerith and Bob: We have Mindy, Sean, Sydney, and then there's Jet. But to be fair, his parents thought Jet was an earth name.
  • Affectionate Gesture to the Head: Dr. Rafferty gives one to Sean in "Face on the Fritz".
  • Affectionate Nickname: As of the episode "Constellation Prize", Sean refers to his mother as "Dr. Mom"
    • Numerous times in Season Two, Jet calls Sean "Sean-zo".
  • Ageless Birthday Episode: Mindy has her birthday in "Mindy's Moon Bounce House", but it is unspecified what age she became. Even though Mindy was 4 up until season 2.
  • Alien Among Us: The whole premise of the show is that the Propulsions are aliens from the planet Bortron 7 who are living on Earth to study its customs, but must keep their alien identity a secret.
  • Alien Animals: Sunspot is kind of a mix of a rabbit, kangaroo, and raccoon.
  • Alien Lunch: Carrot tends to make many odd Bortronian dishes such as "deep-fried lollipops"
  • All-CGI Cartoon
  • Alliterative Name: Mindy Melendez and Sydney Skelley.
  • All Animals Are Dogs: Lampshaded within the show. Sunspot sometimes behaves like a dog, and people often confuse him for one.
  • All-Loving Hero: Jet, being new to Earth, loves everything about it, and is nice to everyone, including Mitchell Peterson, who bullies him and is out to expose his alien identity.
  • All Love Is Unrequited: Mindy's crush on Mitchell is unrequited. Though this trope is later averted in "Detective Mindy".
  • All of the Other Reindeer: In "Visit to Mom's Office", when Jet is telling Dr. Rafferty (Sean's mother), that he is an alien, she says that she felt like an alien when she was a kid, which implies that she was teased as a kid.
  • All Work vs. All Play: Whenever the kids need to solve a problem, Sean wants to use the Scientific Method and work to get the problem solved, while Jet wants to play around and deliberately make mistakes in order to solve the problem.
  • Aliens Speaking English: The Bortronians can speak English perfectly.
  • The Aloner: In "Sean's Year in Space", Sean tries to live in the treehouse for a full year all by himself, but eventually comes down for dinner.
  • Almost Kiss: In the TV movie "Back to Bortron 7", during the Just Add Water number, Jet and Sydney are almost about to either hold hands or kiss, but Celery obscures the shot.
  • Amazingly Embarrassing Parents: In "Project Pluto", Dr. Rafferty unintentionally embarrasses Sean by mentioning that when he was four, he insisted on carrying a purple hippo plush everywhere.
  • Ambiguously Absent Parent: It seems like any kid who isn't named Jet Propulsion only has one parent. Sean's dad, Mitchell's mom, Sydney's dad, and both of Mindy's parents are mysteriously absent. However, Mitchell's mom was heard talking to him in "Mindy's Moon Bounce House", and Mindy's mom can be heard calling to her in several episode.
  • Ambiguously Bi: Jet's sexuality has yet to be confirmed, but Jet always shows signs of being attracted to both Sean (a male) and Sydney (a female). See Ship Tease and the Ho Yay subpage for more.
  • Ambiguous Disorder: Again, this is what Dr. Rafferty (Sean's mom) thinks when Jet reveals that he is an alien from Bortron 7, as "being from another planet/being an alien" is a common metaphorical description of what autism feels like. Sean could possibly have a high anxiety disorder due to being afraid of going to space and paranoid whenever someone touches his birthday telescope.
  • American Gothic Couple: In the episode "The Mindysphere", Sunspot shows a picturenote  on his tablet of Carrot and Celery posing as the American Gothic couple, with Carrot holding a rake instead of a pitchfork.
  • Amusing Alien: The Propulsions may as well be the prime example for this trope.
  • An Aesop: The show has Aesops in a few episodes, but they're unique in that they're woven subtly into the narrative of the episode instead of being shoved down your throat. Examples:
    • The moral of "Sounds Abound" is "Performing experiments is better when you're doing them with your friends".
    • An overall theme of the show is "Failure is a stepping stone to success"
    • "Kid-Kart Derby" has two: "Winning isn't everything" is the main one and "Don't cheat" is the minor one
    • The show had a Be Yourself Aesop in the episode "My Fair Jet" that was surprisingly Played for Drama.
    • "Jet 2" - "It's not good to stay jealous"
    • "Space Junk" - "Knowing there's a problem should make you want to help solve it"
    • "Jet's Time Machine" had a very important one - "You can't change the past, you can only learn from it"
    • "Holidays in Boxwood Terrace" - "You should welcome other people into your friendship group"
    • "Racing on Sunshine" - "Don't be overconfident"
    • "Mindy's Bedtime" has Mindy want to keep the sun from going down so she can play more. Then, she learns about Sydney's pen pal Ahana, who lives in India. When it's day in India, it's night in Boxwood Terrace, and vice versa. When Celery takes the kids to a beach somewhere in the southern hemisphere, Mindy that if she makes the day last a long time, Ahana won't get to wake up, resulting in a very subtle lesson on empathy.
  • Anachronism Stew: Lampshaded during the planetarium show, which includes Pluto as a planet, after it had been demoted, something Sydney points out.
  • And Knowing Is Half the Battle: Sometimes, the Amy Mainzer segments reiterate what was taught in the episode.
  • Animation Bump: The animation in more recent episode of the show is much better compared to older ones. The animation is much more high quality and puts detail into the character models.
  • Anti-Hero: Mitchell appears to be heading in this direction. Mitchell can be sarcastic, condescending, and harsh towards the group, but he has a few Pet the Dog moments that show that he can be nice. The Christmas Episode pretty much reveals that he's a lonely kid who just wants to have friends.
  • Are You Pondering What I'm Pondering?: Happens in a few episodes between Jet and one other person.
  • Arson, Murder, and Jaywalking: In "Earth Camping", Mr. Peterson, Jet, Mitchell, and Carrot get lost in the middle of the woods on their camping trip. Carrot reveals that he has been marking their trail with Mitchell's jellybeans, but then a nearby squirrel comes and eats up the jellybeans that Carrot had laid.
    Mitchell: Hey, that squirrel took all my jellybeans!
    Jet: This is bad. He's eating our trail markers back to camp!
    Carrot: Plus, his teeth are gonna be just awful if he doesn't brush.
    • In "Eye in the Sky", after it is discovered that it will indeed rain on the night of the Space Scouts' sleepout.
    Mitchell: Bad news for Sean's sleepout, but good news for plants and flowers, and umbrella salespeople!
  • Art Shift: In several parts of "Diggin' Earth", Sydney imagines Commander Cressida and her crew digging to the center of the Earth, in a 2D style.
  • Ascended Extra: Dr. Skelley, Sydney's mom. She was only ever mentioned by Sydney during some episodes of season 1, and appears in the very last of said season, but season 2 gives her a lot more screentime and focus.
  • Asian Airhead: It seems the writers are attempting to make Lillian this, but it's downplayed for the most part. In "The Grandest Canyon" she doesn't know what "perspective" means, and in "Mindy Turns Five", she outright tells Mindy what she got her for her birthday instead of keeping it a surprise like she said she would.
  • Ate It All: Several instances. For example, Sunspot eats all of Sean's peanut butter sandwiches in "Sean's Year in Space", and the entire pizza in "Satellite Selfie". In "Earth Camping", Cody eats all of the Petersons' camping snacks.
  • Author Avatar: Jet is one to the series creator Craig Bartlett:
    Craig Bartlett: “Arnold was how I felt being a kid and Buddy the T-Rex is really optimistic and doesn’t see how anything can’t work out and a friend to all. And Jet is even more so because Jet won’t shut up, you can’t get him down, he is always optimistic and he’s like the music man always bursting into song. When I was a kid, I thought wouldn’t it be fun if everything was a musical and people were always bursting into song. So I feel like he is the best iteration of my kind of personality that we’ve come up with yet.”
  • "Awesome McCool" Name: The Propulsions obviously have these names.
  • The Baby of the Bunch: Mindy.
  • Badass Adorable: The kids, while definitely adorable, can be this occasionally. Especially in the one-hour special "Back to Bortron 7".
  • Bad "Bad Acting": During the rehearsal of the pageant in "Holidays in Boxwood Terrace", Mindy performs her lines extremely woodenly.
  • Bait-and-Switch: The episode "Mindy in Space" is about the kids pretending to take Mindy to space, complete with Mindy singing the take-off song
  • Batman Can Breathe in Space: Sean, Sydney, and Mindy can breathe in space, even without spacesuits with oxygen tanks.
  • Beach Bury: A photo on Sunspot's tablet from "Endless Summer" shows Jet being buried in the sand, and in the comic-book montage in "The Tide is High", Mindy is shown with a sand mermaid tail.
  • Beach Episode: "The Tide is High", where the kids try to figure out why the ocean looks different from when they last went there. Thankfully, there is no fanservice involved.
  • Benevolent Boss: As revealed in "Back to Bortron 7", Carrot and Celery's boss is one of the nicest aliens in the Bortron system. Also, Dr. Rafferty's boss in "My Fair Jet".
  • Berserk Button: Sydney will get pissed if you make her miss one episode of Commander Cressida.
    • Sean will murder you if you get a fingerprint on his birthday telescope.
    • Mitchell hates it when people sneak up on him.
  • Be Yourself: Played for Drama in the episode "My Fair Jet". Jet wants to go to the DSA Open House with Sean and Sydney, but Sean and Sydney will only let him go if he behaves like a regular Earth kid. He can't say he's from Bortron 7, he can't use his "tool-armed backpack thingy" (which doubles as a jetpack), and he can't sing. However, at the Open House, the DSA weather balloon flies away in some bad weather, carrying Sean along with it. So, Sydney convinces Jet to be himself, so he can save Sean. He ends up rescuing Sean with his jetpack, and sings a song about how he is Bortronian. Pretty much, if Jet wasn't himself, Sean probably would've been killed.
  • Big Ball of Violence: In "Uncle Zucchini Babysits", Jet, Sean, Sydney, Mindy, Uncle Zucchini, and Moonbeam form one of these while trying to grab Sunspot so they can give him a bath.
  • Big Beautiful Woman: Eggplant, Jet's aunt.
  • Big Brother Bully: More like Little Brother Bully. In "A Kid's Guide to Mars", Face's younger brother, Face 9001, is mean to him, argues with him, and always try to show off, to the point of the original Face calling "MOOOOMMMMMMM!!!!!!!!" at least two times.
  • Big Damn Heroes: In "Back to Bortron 7", just as Celery and Carrot are about to fail their presentation, Jet, Sydney, Zerk, Sean, and Sunspot save the day by putting on a musical number about how Earth is full of water, which convinces Carrot and Celery's boss to let them stay on Earth for another season. Actually, Zerk didn't even perform in the musical number, but that didn't stop him from bragging about how it was supposedly his idea.
  • Big Eater: Jet is this. It seems that every few episodes, he develops a new food interest, whether it be pie or sushi. He even listed eating as one of his favorite things in "Treehouse Observatory". Despite this, he still keeps a skinny stature.
    • Sean is this to a smaller extent. In "Sean's Year in Space", he tries to stay in the treehouse for a year but comes down when he smells pot roast. Also, it is revealed in "Whole Lotta Shakin'" that he stress-eats, and in "Project Pluto", he said that the Propulsions usually have snacks when the kids go to ask Carrot a question about Pluto, which earned him a funny look from Sydney.
    • Sunspot can also be this too. Sunspot eats all of Sean's peanut butter sandwiches in one episode, and scarfed down an entire pizza pie in another. He even ate an entire sub sandwich in "Mindy in Space".
  • The Big Guy: Jet is the tallest of all the children.
  • Big "NO!": Zerk screams "NOOOOOOOOO!" at the end of "Whole Lotta Shakin'" after Jet throws his smartwatch away, which means Zerk can no longer bother Jet.
  • The Big Race: In "Kid-Kart Derby", Jet races against Mitchell in the annual Boxwood Terrace Kids' Soapbox Derby.
    • The sequel episode "Racing on Sunshine" is essentially the same plot, but Sydney, Sean, and Mindy are involved, and in this episode, the kids have to design solar-powered karts.
    • The episode "Space Race" has Celery racing against her brother Zucchini.
      • The sequel episode "Asteroid Belt Space Race" has Celery and the kids racing against both Zucchini and Eggplant & Zerk.
  • Birthday Episode: "Mindy's Moon Bounce House".
    • "Earthday Birthday", even though it is about the anniversary that Jet landed on Earth, and not an actual birthday.
    • "Mindy Turns Five".
  • Bizarre Alien Locomotion: Sunspot moves underwater by whirling his striped tail like a propeller.
  • Black Bead Eyes: Sunspot and Moonbeam both have these eyes.
  • Black Best Friend: Sydney.
  • Bland-Name Product: Jet mentions wanting to play Bortropoly when they get home in one episode.
  • Blonde, Brunette, Redhead: Seannote , Sydney, and Jet.
    • This also goes for the four main DSA scientists: blonde (Dr. Bergs), brunette (Mr. Peterson and Dr. Skelley), and redhead (Dr. Rafferty).
  • Blue Is Heroic: Jet and his (immediate) family are heroes, and they wear blue space-suits.
  • Bowdlerization: In "Just the Right Distance From the Sun", Sydney tells the story of Icarus to Sean, but mostly leaves out the part about his death.
  • Book-Ends: The season 1 premiere, "Tour of the Solar System", starts off in Jet's backyard. The season 1 finale, "Commander Mom", ends in Jet's backyard.
  • A Boy and His X: Jet and his alien pet Sunspot.
  • Brain Freeze: Sunspot gets one in the beginning of "Mindy's Ice Rink" after he eats a popsicle.
  • Brainy Brunette: Sean and his mom are both know a lot about science, and they both have brown hair.
    • Mitchell counts too.
  • Bread, Eggs, Breaded Eggs: Happens in "Commander Cressida Begins".
    Mindy: I guess, a planet. No, a moon. No, a planet with a moon?
  • Breaking the Fourth Wall: In Mindy's Weather Report, Mindy is watching TV and comes across a channel which is showing Dinosaur Train, one of Craig Bartlett's shows.
    • There's an extremely meta line in "Mindy and Carrot Bake:. When Mindy and Carrot are stuck in space, they try to call Face 9000 for help, but they find out he's on vacation, which explains his overall absence from the show as of late season 1 and early season 2.
    • In "Mini-Golf at the DSA", Sean breaks the fourth wall when he says "Hey, that's my line!" in response to Mr. Peterson using his catchphrase.
  • Breather Episode: In some episodes, the show will take a break from teaching science to provide entertainment and character development in it's episodes: "My Fair Jet", "Jet's First Halloween", "Date Night", "Jet's Time Machine", "Mindy in Space", and "Holidays in Boxwood Terrace" all qualify for this trope, all of them having little to no actual curriculum (even though "Jet's Time Machine" provided an important Aesop and "Jet's First Halloween" tried to teach viewers about harvest moons).
  • Brick Joke: One early example of Carrot's weirdness is when the kids find him mowing the roof of his house. We find out it's not (quite) so silly in "Back to Bortron 7", which reveals that Bortronian houses are designed to blend in with their natural surroundings and hence, have red grass on their roofs that needs mowing.
    • In "What's Up With Saturn's Rings?", Mindy and Sunspot wish that Saturn's rings were made out of cookies. In "Solar System Bake Off!", the kids bake a Saturn cake for the titular bake-off. They make the rings out of cookies.
    Mindy: I always wanted Saturn's rings to be made out of cookies!
  • Brief Accent Imitation: In "Castaway Carrot", while Carrot is stranded on the moon, he decides to go in his "talk-with-an-accent" crater, and briefly talks with a British accent.
    Carrot:'Ello, guv'nor. Fancy a spot of tea or bangers and mash?
  • Broken Aesop: In "Solar System Bake Off", the kids aren't allowed to ask for help from grown-ups. Technically, they did ask for help by asking Jet's mom to drive them to Saturn to find out if it's cold outside, hot inside or the other way around.
  • Broken Bird: If you think about it, Sean really has it rough. Sean’s got a Disappeared Dad and a mother who’s almost working. He’s also a huge perfectionist. He always needs everything to be the way he wants it to, and he gets very upset when he doesn’t get his way. He idolizes Neil Armstrong heavily, to the point of obsession, and wishes to be like him, but he can’t. Sean also fears cramped spaces, heights, and easily gets space-sick, which are things that are preventing him from becoming an astronaut. Despite wanting to be an astronaut, he heavily fears space, and is constantly forced by his friends to go. They never allow him to stay on Earth. He’s also somewhat of a Butt-Monkey within the group, and no one listens to him when he suggest using the Scientific Method to solve problems. He hides all of this pain with a Cheerful Child exterior. It makes you want to jump into the TV and give him a hug.
  • Buffy Speak: The Propulsions talk like this sometimes, such as calling the humans "Earthies".
  • Bumbling Dad: Carrot is this due to be very silly and often clueless compared to his wife. However, he provides helpful information to the kids and is a great baker.
  • The Bus Came Back: In "Mindy Turns Five", Lillian finally comes back after disappearing for a while. She even had the same voice actor that she had in "The Grandest Canyon"!.
  • Butt-Monkey: Due to this being a show for young children, this is very mild, but Sean seems to be this.
  • By the Lights of Their Eyes: Briefly in "Jet Can't Sleep". There was a brief black out, and only the Propulsions' eyes were visible.
  • Call-Back: "The Grandest Canyon" references an earlier episode where Mindy mishears "perspective" as "respective", only this time Mindy can say it and it's her friend Lillian who has the same trouble with the word. Mindy lampshades the situation.
    • In "Holidays in Boxwood Terrace", Jet seems confused by Christmas at first, and Sean brings up how Halloween was confusing for him and his parents in the Halloween Episode.
    • "Endless Summer" includes a call-back to "Holidays in Boxwood Terrace", with Sunspot showing images from that episode on his tablet.
  • Calling Your Bathroom Breaks: In "Back to Bortron 7", after Sydney asks him what he wants to do, Sean says he has to go to the bathroom. He never does actually go to the bathroom, though.
  • Came from the Sky: As shown in the theme song, Jet's house just fell to Earth.
  • Camping Episode: "Earth Camping", where Carrot and Jet go camping with Mr. Peterson and Mitchell.
  • Camp Straight: Carrot. He does feminine activities such as cooking and ballet (as revealed in "Castaway Carrot"), wore a pink scarf in the aforementioned episode, and yet he is married to Celery.
  • Canine Companion: Cody, to Mitchell.
  • Cannot Keep a Secret: Jet has a hard time keeping his alien identity a secret.
    • Even the Propulsions have a hard time keeping other secrets. In "Earthday Birthday", Carrot and Celery let slip that a surprise party is being planned to Jet, luckily they don't tell him that it is for him (to celebrate the anniversary of when he arrived on Earth)
  • Cartoon Creature: Sunspot, as well as the other Bortronian pets such as Moonbeam. They look like dog-cat-bunny-kangaroo-raccoon hybrids. Uncle Zucchini even lampshades this in "A Visit from Uncle Zucchini".
  • Cash Cow Franchise: Commander Cressida, in-universe. It has a show, a comic book series, and tons of merchandise, including wristwatches, toys, backpacks, and Halloween costumes.
  • Cassandra Truth: Expertly played with in "Back to Bortron 7". In order to keep the Propulsions' alien identity a secret, Jet 2 has to project a hologram of their house so that no one would notice that they were gone. However, Jet 2 later has trouble keeping the hologram stable, which leads to it glitching. Mitchell even stays up all night to prove to his parents that the Propulsions are aliens from another world. However, when he takes his father outside, the hologram is perfectly fine, which leads to Mr. Peterson scolding Mitchell for waking him up at 2:00 AM. When the Propulsions are just about to land back on Earth, the hologram disappears completely, and then Mitchell tries to expose Jet's secret to the entire population of Boxwood Terrace, however Jet 2 causes an eclipse which distracts the townspeople from seeing the Propulsion house land back on Earth. Mr. Peterson scolds Mitchell again, telling him that he has quite an imagination, but Mitchell claims that he has no imagination.
  • Cast of Snowflakes: Somewhat. All of the characters have unique designs, especially the adults.
  • Casual Interstellar Travel: The flying saucer can go to space in a short amount of time. This is because they have interstellar overdrive.
  • Catchphrase: "Excelsior!" (onward and upward in Latin) - Jet
    • Also, "SUNSPOT, CAR TRIP!" and "What an amazing/funny/great Earth word!"
    • "Let's think scientifically" - Sean
    • "A kid's place is exploring space!" - Sydney
    • "POPPYCOCK!" - Western!Sean in "Lone Star".
    • "Hi, I'm Astronomer Amy Mainzer." - Amy Mainzer
    • "So the next time you do X..." - Amy Mainzer
  • Central Theme: No matter what happens, keep a positive attitude and persevere through obstacles, no matter how impossible they may seem.
  • Cerebus Rollercoaster: Beginning with the episode "What Goes Up..." the show constantly switches between having cute, light-hearted episodes and having dramatic, emotional, and sometimes even dark episodes.
  • Character Development: As time goes on, Sean becomes less and less scared of going to space. He even calls himself "Mr. Adventure".
    • Zerk was initially stuck up and rude towards Jet and his friends. Come "Back to Bortron 7", he is much nicer to them, but still keeps a bit of his It's All About Me attitude. In "Zerk Visits Earth", his vain attitude disappears completely, and he is polite and respectful towards his cousin and the Earthies.
    • Mitchell was a bit naive before, as he actually believed Jet when he told him (in his alien costume) that he was from Bortron 7 in the Halloween Episode. Come season 2, however, Mindy explicitly tells him that she went to the moon, and even holds up a moon rock, but Mitchell doesn't believe her.
  • Character Title: The title has Jet's name in it, and it is named after the Jet Propulsion Lab. It also helps that the show used to be titled Jet Propulsion.
  • Cheerful Child: All of the children count as this, but special mention goes to the protagonist, who sees the good in everything, is a Friend to All Living Things, and is perpetually enthusiastic.
  • Chekhov's Gun: The big rock Mindy sits on in "Mindy's Meteorite Stand".
  • Child Prodigy: The kids all seem to be this. They are all extremely smart for their age.
    • At least justified with Sean, as his mom is a scientist who works at the space program.
  • Chirping Crickets: In "Ice Moon Enceladus", the kids make their own sno-cone stand so they can raise money to send astronauts to Mars. Sean insists that since it's so hot out, they should be able to sell a ton of them, but then crickets start chirping since no one is there.
  • Christmas Episode: The show now has its own Christmas half-hour special entitled "Holidays in Boxwood Terrace", that focuses on the gang putting on a Christmas pageant and desperately trying to seek and define the Spirit of Christmas.
  • Chroma Key: This is used in the Amy Mainzer segment in "Back to Bortron 7".
  • Chuck Cunningham Syndrome: Face 9000's brother, Face 9001, only appeared in the episode "A Kid's Guide to Mars" and never came back.
  • Cloudcuckoolander: The Propulsion family seem to be this at times, with their wacky antics.
  • Combat Commentator: In "Space Race", while Celery and Zucchini are racing, Sydney briefly provides sports-like commentary.
  • Comically Missing the Point: As noted above, in the Camping Episode, a squirrel eats all of the jellybeans that Carrot had been marking their trail with. Mitchell and Jet are concerned that they are lost, but Carrot is only concerned about the squirrel's dental hygiene.
    • In the beginning of "The Mindysphere", Sean tells Jet and Sydney about how his mom taught him about the heliosphere while eating breakfast. Jet is only interested in what Sean had for breakfast.
  • Companion Cube: Sean, Sydney, and Mindy all have one. Sean has his Neil Armstrong action figure, Sydney has her Commander Cressida action figure, and Mindy has her teddy bear, Stuffy Bear.
  • Constantly Curious: Mindy. 8 times out of 10, her questions are what prompt the kids to go into space. In fact, all the main kids could qualify for this trope, giving the likes of Curious George and Sid the Science Kid a run for their money.
  • Continuity Cavalcade: In "My Fair Jet", one of the tasks that Jet has to do in order to be a regular Earth kid is to sort a bunch of pictures that Sunspot took in previous episodes, such as the butt picture from "Satellite Selfie", and the Great Red Spot Club group picture from "Sunspot and the Great Red Spot".
  • Continuity Nod: See Call-Back above.
    • In "Mindy Pet-Sits", Mindy comes across the meteorite that she found in "Mindy's Meteorite Stand".
    • In several episode, the kids point out how they have already been to certain planets.
    • Jet builds a robot in the episode "Jet 2". In later episodes, the robot can be seen around the children.
    • Some in "Mindy Turns Five::
      • Similar to how Mindy was jumping on the bounce house in "Mindy's Moon Bounce House", she is seen jumping on it again, and is singing a song that is sung to the tune of "My Name is Mindy".
      • Before the gang gets back to Earth, they look at and describe Earth like they looked at and described it in the episode "Tiny Blue Dot".
      • The gang goes to Pluto a second time, and they sing "Dear Little Frozen Pluto" again.
    • The squirrel that ate Mitchell's jellybeans in "Earth Camping" makes several more appearances throughout the show, in "The Mindysphere", "Space Race", "Jet Shrinks the Kids", and in "Mindy's Bedtime", he is finally given a name: Floyd.
    • In "Galileo, Galileo!", Mindy unintentionally makes Sean nervous to do his report on Galileo, and while doing so, Sean imagines himself on the exact same stage that the kids did their Christmas pageant in "Holidays in Boxwood Terrace", which is where Sean got nervous to perform his song in front of everyone.
    • In "Total Eclipse Block Party", Sean and Sydney initially won't let Jet perform on the DSA stage for fear that he will sing and use his Bortronian robot arms, which is a reference to the events of "My Fair Jet".
    • "Racing on Sunshine" takes place one year after "Kid-Kart Derby".
  • Convenient Eclipse: Played straight in "Back to Bortron 7". When Mitchell is about to expose Jet's secret to the entire town, Jet 2 causes an eclipse which distracts the townspeople from seeing the Propulsion house land back on Earth.
  • Cool Pet: Sunspot.
  • Cool Shades: Sunspot wears some sometimes, such as when he's playing the instruments to Jet's songs.
  • Credits Gag: In episodes like "Backyard Moon Base", the Commander Cressida theme song plays in the credits.
  • Crazy Enough to Work: Many of Jet's ideas are this.
  • Curtains Match the Window: Mindy has brown hair and brown eyes.
  • Cute Machines: Beep and Boop, the twin rover sisters. Beep lives at the DSA and Boop lives on Mars.
  • The Cutie: Jet proves to be this trope entirely with his adorkable tendencies. Mindy and Mitchell also qualify for this trope.
  • Deadpan Snarker: Mitchell, Mindy, and to a lesser extent, Sean.
  • Defrosting Ice King: Mitchell in "Detective Mindy", where he becomes kinder than he usually is.
  • Deus ex Machina: Sunspot often functions as this, figuring out what is going on and what needs to be done and then conveying that information to one or more of the children.
    • Some of these occur in the secret alien identity arc. In "Visit to Mom's Office", Jet openly tells Dr. Rafferty that he is an alien from Bortron 7, but luckily, Dr. Rafferty thinks that Jet is pretending to be an alien due to "feeling" like one. And the residents of Boxwood Terrace don't notice the Propulsion vehicle transforming into a flying saucer.
      • As mentioned above, Jet 2 causes an eclipse in the TV movie "Back to Bortron 7", which distracts the townspeople.
  • Demoted to Extra: Face 9000. Back in the day, he appeared in practically every episode alongside the rest of the Core Eight: Jet, Sunspot, Sean, Sydney, Mindy, Carrot and Celery. Ever since "Sunday Drive", he has been making less and less appearances. Nowadays, the kids usually get answers to their science questions from Celery, the DSA scientists, or by figuring it out themselves.
  • Depending on the Artist: For whatever reason, the characters' looks can change from episode to episode. For example, in one episode Mindy might have slightly darker skin but reddish-brown hair, or slightly lighter skin but blackish-brown hair. Also, Mindy might be way shorter or the same height as Mitchell. Sean may either have light brown, reddish-brown, or flat out blonde hair. His eye color also varies. It might be green, blue, or grey. Sydney sometimes has a different color hair-tie than her usual yellow, like green or red. She might even wear grey leggings at night as shown in the end of "Back to Bortron 7" and "Jet's Time Machine". Jet's hair color also varies. It might be reddish-orange, red with orange tips, dark red, or even pink! (Jet seems to have pink hair in the beginning of "Lone Star".)
  • Depending on the Writer: In some episodes, Mitchell can be a quiet yet obedient spy and in other episodes, he can be cold and anti-social.
  • Desperate Object Catch: In "A Hammer and a Feather", Jet gets a bit carried away with a gravity experiment and thoughtlessly tosses Sean's telescope off the treehouse balcony. Sunspot dives underneath it and puffs up his belly like a balloon, so the telescope bounces back up again where Sean can reach over the balcony and grab it safely.
  • Dick Dastardly Stops to Cheat: In "Asteroid Belt Space Race", Eggplant stops to turn on the anti-gravity fluxinators in her saucer. Upon using them, the other saucers lose gravity, causing Eggplant and Zerk to win the race.
  • Did Not Think This Through: In "Kid-Kart Derby", Mitchell finds the plans for an ion drive, but it does not work because Mitchell didn't read farther down in the plans.
  • Disappeared Dad: Sean says he has a dad in "Night of a Bazillion Stars", but he is never seen, though Sean's mom is always shown.
  • Disco Dan: Jet is shown to be fond of notably dated music, specifically '50s rock and roll and Broadway.
  • Disproportionate Retribution: In "Ice Moon Enceladus", the kids set up a sno-cone stand in order to raise money to send astronauts to Mars. Now, an important characteristic of Sean's is that he wants to grow up to be the leader of the first human mission to Mars. Mr. Peterson comes by the kids' sno-cone stand, and Mindy informs him that buying a sno-cone will help send Sean to Mars. Mr. Peterson recognizes Sean as the kid who keeps kicking his soccer ball into his yard, and then Mr. Peterson proceeds to purchase several. In short, Mr. Peterson wants to send Sean to Mars just for kicking his soccer ball into his yard.
  • Distressed Dude: In "My Fair Jet", the DSA weather balloon flies off in some nasty weather, and carries Sean along with it. But luckily, Jet saves him with his jetpack.
    • In "Castaway Carrot", Carrot gets stranded on the moon, but gets rescued by his family.
  • The Ditherer: "Commander Cressida Begins" explores Mindy's indecisiveness on where to go next in space. Luckily, she learns that just like Commander Cressida, she can explore space one adventure at a time.
  • The Ditz: Jet and his dad both qualify, but especially Jet since his friends keep telling him to not tell anyone he's from Bortron 7, and yet he still does. Luckily, when he told Sean's mom, she thought that he feels like an alien, like she did when she was a kid.
  • Ditzy Genius: Again, Jet is this. Jet can name every one of Jupiter's moons, but can't try to keep his alien identity a secret.
  • Do-Anything Robot: Sydney's mom programs Jet's robot clone, Jet 2, to a robot that can do practically anything in the season 1 finale. He is renamed to Jet 3.
  • Does This Remind You of Anything?: "Lone Star" has Jet portray a pioneer who wasn't afraid of new ideas. Because of that, he clashes with the people of Boxwood Territory, who want things to stay the same. There's even a song about how you shouldn't be afraid of new ideas, and that "Old ideas ought to move aside, so the new ones can replace 'em". What Do You Mean, It's Not Political?, indeed.
  • Do I Really Sound Like That?: Sean says this in "Back to Bortron 7" after a bunch of TV screens show him saying "Booyah! Science!"
  • "Do It Yourself" Theme Tune: People of Earth, you ain't seen nothing yet! I'm from Bortron 7 and my name is Jet!, I'm a space tripper and a galaxy crosser. My parents brought me here in a flying saucer, and Nice to meet you, human race, tell me all about the place! all of which are spoken by Jet.
    Sydney: Jet Propulsion!.
    Sean: Jet Propulsion!
    Mindy: Jet Propulsion!
    All: Ready Jet Go!
  • Does Not Like Spam: In "Mindy's Weather Report", Jet reveals that he hates ice cream. This hatred is also shown in "Asteroid Patrol" and "Detective Mindy". He'd give it a chance if it wasn't "so cold".
  • Don't Sneak Up On Me Like That: Mitchell hates it when people sneak up on him. In the episode "What Goes Up...", Mindy sneaks up on Mitchell as he is spying on Jet. He gets very startled. No violence is involved, since this show is for young children.
    Mitchell: ...Mindy?!? Don't sneak up on me like that!
    • In "Holidays in Boxwood Terrace", Mitchell berates Jet for unintentionally sneaking up on him.
  • Double-Meaning Title: "A Star is Born" both refers to the educational theme of the episode (how stars are born) and the plot of the episode (the kids making a movie).
  • Drama Queen: Jet is this in the episode "Jet's Time Machine". He builds a time machine, and he wants to go back in time because the previous weekend, he ate a delicious pie and forgot to ask for seconds. Then he makes a big deal over it.
    "How could I have been so foolish?"
    • In "The Tide is High", Sunspot makes friends with a crab. When he discovers that the crab is gone, he gets way too upset and faints on Dr. Skelley's lap.
  • Dynamic Entry: Zucchini slides right on into Boxwood Terrace, in "Uncle Zucchini Babysits", complete with Moonbeam playing guitar.
    Uncle Zucchini: Hi-ho, Propulsions! Found your house this time!
  • Early Installment Character-Design Difference: In Zerk's wristphone picture in "Whole Lotta Shakin'", he bears an uncanny resemblance to his cousin, Jet. In "Back to Bortron 7", he makes his first physical appearance and has a new, permanent design that is different from his cousin's.
  • Edible Theme Naming: The Propulsion family, with the exceptions of Jet and Zerk, are named after vegetables. Examples: Carrot, Celery, Eggplant, Zucchini, and Spinach. Jet even calls himself Cucumber in the Halloween Episode.
  • Edutainment Show: This show teaches kids about Earth science (gravity, force) as well as space science (planets, the Sun) but also gives good lessons.
  • Ensemble Cast: While Jet is definitely the main character, Jet, Sean, Sydney, Mindy, Sunspot, Carrot, Celery, and Face 9000 (or "the Core Eight") all get episodes focused on them.
  • Episode Title Card: Appears during the first few seconds of every episode, and also credits the writer of the episode.
  • Everybody Laughs Ending: Happens in a few episodes.
  • The Everyman: Sydney.
  • Everyone Is a Suspect: Played with in "Mindy's Mystery". The kids interview everyone they know and interrogate them about the mystery smell.
  • Excited Show Title!: Ready Jet Go!
  • Expository Theme Tune: The rather catchy theme song of this show explains the plot of this show in one minute.
    • Jet Propulsion, that's his name. Jet Propulsion, he'll rocket to fame! When he arrived, he created a buzz, cause there was no house, and then there was. One gets the sense that the show was very nearly entitled "Jet Propulsion."
  • Expy: Celery is an expy of Miss Frizzle from The Magic School Bus. They are both eccentric ladies with red hair, and they drive vehicles that take children on wacky science adventures.
    • Sean is also an expy of Arnold from that same show, because they are both butt monkeys and lovable cowards, and are always hesitant to go on trips.
  • Face Palm: Happens quite often.
  • Fainting: Several.
    • Carrot faints into Celery's arms when Jet mentions him in his song in "My Fair Jet".
    • Moonbeam faints after Sunspot flirtatiously winks at her in "Back to Bortron 7".
    • Jet faints after Zerk informs him that his parents will be assigned to another planet after their presentation in "Back to Bortron 7".
    • Mitchell faints at the very sight of Mindy in "What Goes Up...", after she sneaked up on him a second time.
      • He also faints at the sight of Mindy at the end of Jet Shrinks the Kids.
    • Sunspot faints on Dr. Skelley's lap in "The Tide is High" after discovering that the crab he has befriended has disappeared.
    • In "Mindy's Bedtime", Sean collapses after walking backwards for a long time.
  • Failures on Ice: A Running Gag on the show.
    • In "What's Up With Saturn's Rings?", Sean slips while trying to skate on Saturn's rings.
    • The kids also have trouble standing on Pluto in "From Pluto With Love".
    • Sean slips on the ice rink in "Mindy's Ice Rink:.
  • Fangirl: Sydney is this to Commander Cressida.
  • Fantastic Anthropologist: The Propulsion parents came to Earth to study it. They return to Bortron in "Back to Bortron 7" and give a report on it.
  • Fantastic Racist: In "Whole Lotta Shakin'", Jet's cousin Zerk says that humans are not good at building. Keep in mind that this is a cartoon aimed at children.
  • Faster-Than-Light Travel: In the one-hour special "Back to Bortron 7", the Propulsions convert their house back into a starship for a visit to their home planet. Whereas their usual saucer has used Interplanetary Hyperdrive to bring the kids on tours within the solar system, this much longer journey requires Interstellar Superdrive. Details on how it works aren't given, but their journey is accompanied by a flashier, more colorful variant on the light-speed F/X from Star Wars.
  • Fast-Forward Gag: In "Measure for Measure", while Jet is measuring how many astronomical units Neptune is from the Sun, a video progress bar appears. Sunspot appears behind the bar and fast forwards, speeding up the process.
  • Fatal Flaw: Sean's fatal flaw is that he fears cramped spaces, heights, and gets space-sick easily, but he must overcome these fears in time so he can achieve his dream of being an astronaut when gets older.
  • Fat Best Friend: Sean is the most overweight of the clique, but he doesn't really fit into any categories, as his main defining traits are his high intelligence and reluctance to go to space.
  • Feud Episode: "Treehouse Space Station.", where the kids fight over who gets to use the treehouse for whatever reason.
    • In the episode, "Which Moon is Best?", Sean wants to be the first person to walk on a specific Moon. For the rest of the episode, Jet's parents argue over which moon Sean should walk on: Enceladus or Europa. They even have an argument in song. Luckily, they discover that both Enceladus and Europa are good moons in their own right.
  • Fictional Counterpart: In a presentation, the creator, Craig Bartlett said that Commander Cressida is supposed to be a long running franchise like Doctor Who.
    • The Deep Space Array, where all the kids' parents work, is an Expy of NASA's Jet Propulsion Laboratory in Pasadena.
  • Fictional Video Game: In "Asteroids, Meteors, and Meteorites", Sydney and Sean play a video game called Astro Tracker, where to win, you have to identify and name certain asteroids.
  • Fiery Redhead: Jet, the energetic type.
  • Fish out of Water: The Propulsions are aliens trying to fit into Earthie society.
  • Five-Man Band:
  • Flying Saucer: The Propulsions have a minivan which turns into a flying saucer in space.
  • Food as Bribe: In "Pet Sounds", the kids realize that they can use dog treats to motivate Cody to do tricks.
  • Forgetful Jones: The Propulsions always forget not to tell people that they come from Bortron 7.
    • Jet, who always needs to Sean to teach him the Scientific Method over and over.
  • For Halloween, I Am Going as Myself: In the Halloween special, Jet dresses up as an alien. And gets away with telling people he is from Bortron 7.
  • Foreshadowing: Plenty of examples.
    • In "Backyard Moon Base", the kids find the house remote. They press some of the buttons on it, which causes the house to fly in the air, unbeknownst to them. In "Back to Bortron 7", it is revealed that the Propulsion house is actually a starship turned house. Pressing the remote converts the house back to a starship. No wonder Carrot was especially freaked out when he saw the house flying in "Backyard Moon Base".
    • In "Project Pluto", Carrot at one point utters "little frozen Pluto". And in the planetarium show in "Visit to the Planetarium", the aforementioned show refers to Pluto as "dear little frozen Pluto". Both foreshadow the song "Dear Little Frozen Pluto" from "From Pluto With Love".
    • Tons of examples in "Back to Bortron 7":
      • During the first song "Is Your Planet Like My Planet?", one of the lyrics is There's no planet like my planet, which foreshadows the song aptly named "There's No Planet Like My Planet".
      • Somewhere at the beginning of the movie, Carrot and Celery are practicing their PowerCube presentation. Their lines are It's not too hot, and not too freezing / And is suitable for breathing / Not too big / And not too small / And planet Earth is what its called!. Later, during the Just Add Water song, the cast sing these lines: Plus it's not too hot, and no, it's not too freezing / Add to which its atmosphere is suitable for breathing / It's really not too big / And really not too small / And planet Earth is what its called!
      • At one point, Jet says "What do you call those things in cities that shoot water in the air?", and Sydney and Sean respond with "Fountains.". Later, during "Just Add Water", the song stops so Celery can asks what they call those things in cities that shoot water in the air. Guess what Sydney, Jet, and Sean respond with.
      • In the show credits, doodles of the characters are scattered throughout. However in the credits for "Back to Bortron 7", at one point we see Mindy in a space suit, which foreshadows the fact that Mindy is turning five in season 2, and will be able to go to space.
  • Four-Temperament Ensemble: Jet (Sanguine), Sean (Melancholic), Sydney (Phlegmatic), and Mindy (Choleric).
  • Free-Range Children: The children are always doing stuff on their own, such as building a treehouse. Craig Bartlett even stated that the kids' adventures are supposed to be similar to his childhood adventures where the kids would just run around without adult supervision.
    • Somewhat averted, since the kids always have adult supervision in space.
  • Freeze-Frame Bonus: Plenty in "Back to Bortron 7". At one point in the movie, Mindy wakes up at midnight and tries to make Jet 2 put the hologram of the house back, and Jet 2 instead projects many other holograms that can only be seen if you pause. The holograms include Sean standing with his hands folded, that same hologram with Sean's mouth closed, a hologram of Sydney, a hologram of Sean in his space-suit, the weather balloon from "My Fair Jet", a hologram of Mitchell cackling, a hologram of Sunspot in a Greek outfit from "Jet's Time Machine", a hologram of Mindy in her pajamas on the flying saucer, and a hologram of the pineapple jack-o-lantern from "Jet's First Halloween".
  • The Friend Nobody Likes: Zerk, mostly because he was a racist bigot to the Earthies in the past, and he is quite irritating. The other kids only hang out with him because he's Jet's cousin. Everyone is actually glad when he leaves at the end of :Zerk Visits Earth".
  • Freudian Trio:
    • Sydney is the Id. Unlike Sean, Sydney wants to become a successful science fiction author and is more into science fiction and Greek mythology. She is also more emotional, kind, and loving than any of the group.
    • Sean is the Superego. Sean is studious and smart, and wants to grow up to be a great scientist and lead the first human mission to Mars. Sean is also concerned about his grades most of the time and uses the Scientific Method, as well as logical reasoning, to solve problems. Due to this, he has a terrible imagination.
    • Jet is the Ego. While Sean and Sydney are polar opposites, Jet is one of the sole reasons why they hang together and the arrival of Jet pretty much brought them together. Jet is talented at acting, singing, and dancing, and is curious about everything, especially Earth. Jet is also kind and generous, and always has a positive attitude and great leadership skills.
  • Friendly Enemy: Mitchell is this to Jet and his group. Mitchell is rude to the group, but he can get along with Jet and Mindy sometimes.
  • Funny Background Event: In "How Come the Moon Changes Shape?", Carrot and Celery sing an amazingly sappy love song. While they're singing it, Jet and Sean are grossed out, and Sydney and Mindy punch them for disliking the song.
  • Gadgeteer Genius: Dr. Skelley, Sydney's mom. She knows all about robotics, engineering, and technology. She also holds a strong belief that robots are the future, and teaches the kids about the types of jobs robots have, like helping out at a grocery store, rescuing trapped animals during a flood, collecting comet dust samples, and exploring volcanoes on Mars. She even rebuilds Jet's robot clone, Jet 2, at the end of the episode and makes him into a Do-Anything Robot. Now that is awesome.
  • Gender-Blender Name: Sydney is traditionally a boy's name.
  • Gender-Equal Ensemble: In Jet's clique, there are two boys (Jet and Sean), and two girls (Sydney and Mindy).
  • Genki Guy: Virtually every member of the Propulsion family.
  • Get Ahold Of Yourself Man: The gang is usually this to Sean, who is usually apprehensive about going to space
  • Getting Crap Past the Radar: Since Hey Arnold and Dinosaur Train both have instances of these, it's no surprise, that this show has it too, even if the jokes seem to verge between this and Accidental Innuendo.
    • Sometimes, Carrot and Celery's flirting can go past......what would be acceptable in a show like this.
    • In "How Come the Moon Changes Shape?", Mindy punches Jet in the crotch.
    • In "Detective Mindy", it looks like Mindy is staring at Mitchell's behind and even putting her finger into it at one point, even though Mindy was just tapping him on the back.
    • In "Kid-Kart Derby", Jet is explaining to Mitchell what "torque" is, and Mitchell pronounces it as "twerk".
    • In "Uncle Zucchini Babysits", Jet, Sean, Sydney, Mindy, Moonbeam, and Uncle Zucchini end up forming a Big Ball of Violence while trying to grab Sunspot so they can give him a bath. The end results are....a bit odd, to say the least.
    • The animators seem to be a bit too fond of the characters' butts, and yes, this includes the children. We get this scene in "Back to Bortron 7", and during the "Neptune Kind of Day" number in "Sean's Neptune Tune", Sean briefly shakes his rear at the viewer.
      • In "Satellite Selfie", Sunspot takes a picture of Mr. Peterson's butt. And Sunspot accidentally takes a picture of his own crotch. The butt picture even shows up again in "My Fair Jet". Were the censors asleep when approving this episode?!?
    • During this scene from "Detective Mindy", Mitchell sounds like he's saying "ass" instead of "ask".
    • In "Back to Bortron 7", it is revealed that Bortronian buildings look very.......phallic shaped.
      • When Zerk meets up with Jet, he actually uses "God!" as an exclamation. This was not edited in later airings of the movie, and parent groups haven't caught on....yet.
    • In "So Many Moons", Mindy expresses concerns over getting a younger sibling, then we get these linesnote :
    Jet: Hey, I know someone - or, I guess, something - thats got around 60 kids, and they all get along somehow.
  • Gilligan Cut: Happens in "Space Junk", where Sean says there is no way he is flying outside the saucer. In the next scene, he says he can't believe he's flying outside the saucer.
  • Girlish Pigtails: Mindy wears her hair like this.
  • Girls' Night Out Episode: "Commander Cressida Begins" mostly focuses on the female characters, namely Mindy, Sydney, Celery, and Dr. Skelley. On top of that, Celery takes only Sydney and Mindy to space to see Jupiter's moons, while leaving behind Jet and Sean.
  • Girly Girl: Mindy.
  • Glass Smack and Slide: In "Castaway Carrot", the saucer malfunctions which causes Jet, Celery, and Sunspot to end up smushed against the saucer window. They then slide off.
  • Go Mad from the Isolation: Carrot undergoes a major Sanity Slippage in "Castaway Carrot" while stranded on the moon. He gets a twitchy eyelid at one point, attempted to farm pizza on the moon, and drew pictures of his family on rocks, and made out with the Celery rock.
  • Good, Open Minded Parents: Jet's parents are very kind, tolerant, and encourage the children in their science exploration, and are always happy to take them into space.
  • Graceful Ladies Like Purple: Part of Lillian's dress is purple.
  • Green-Eyed Monster: In the episode "Jet 2", Jet gets jealous of his robot clone, Jet 2, because Sean and Sydney are playing with the robot and not the real Jet.
    • In "Back to Bortron 7", Face 9000 is extremely salty that the Propulsions have chosen the PowerCube for their presentation and not him. He does get to help with the presentation at the climax, though.
  • "Groundhog Day" Loop: Happens in "Jet's Time Machine", where the kids go back in time, but are stuck in an endless loop and keep missing the meteor shower. However, once they correct their mistakes, they break out of the loop and are able to watch the meteor shower.
  • Groupie Brigade: Mitchell tries to invoke this in "Kid-Kart Derby" by asking anyone if they want autographs from him after he won the race, but fails.
  • Group Hug: Jet, Sean, and Sydney share one in "Back to Bortron 7".
    Jet: Come on guys, bring it in!
  • Growling Gut: Whenever Sean gets space-sick, it's often accompanied by his tummy rumbling.
  • Hair Decorations: Lillian has a big pink bow in her hair.
  • Hair of Gold, Heart of Gold: Bergs has blonde hair, and is very kind and friendly.
  • Halloween Episode: "Jet's First Halloween" and "That's One Gigantic Pumpkin, Jet Propulsion!".
  • Handshake Substitute: In "Detective Mindy", the kids put together pieces of evidence and discover that Mr. Peterson had knocked his wife's sunglasses down with his glass of water, and then Mrs. Peterson vacuumed them by mistake. Jet and Sean then proceed to do a fist bump.
  • Happily Married: Carrot and Celery, even having a love song dedicated to them.
  • Hartman Hips: Jet's aunt, Eggplant, has these.
  • Height Angst: Mindy expresses angst about being small in "Jet Shrinks the Kids", which kickstarts the main plot of the episode.
  • The Hero: Jet, of course.
  • Hey, Let's Put on a Show: The synopsis of "Holidays in Boxwood Terrace", but without monetary gain in mind.
    • This is also the plot of "A Star is Born".
  • Hey, That's My Line!: In the episode "Mini-Golf at the DSA", Sean says this when Mr. Petersen scores a hole-in-one and says Sean's catchphrase "Booyah, science!".
  • Hidden Depths: Sunspot is revealed to have many talents. He can pull objects out of Hammer Space, and can play several instruments, including concertina and pan-pipes.
    • Jet has these, too. He turns out to be very handy with tools, and a great musician.
    • Carrot is revealed to be a great cook, and "Castaway Carrot" reveals that he taught himself ballet.
    • "Eye in the Sky" reveals that Mitchell is an expert on weather.
  • Hidden in Plain Sight: The show thrives off of this trope. The Propulsions coincidentally look like humans, which allows them to hide in plain sight on Earth easily without anyone discovering their secret alien identity. Averted with Sunspot, some characters like Dr. Rafferty and Mitchell often question what kind of animal he is.
  • Hiroshima as a Unit of Measure: In "Measure for Measure", the kids decide to make a scale model of the solar system in the yard. They use Sunspot as an astronomical unit.
  • Hoist by His Own Petard: An odd example. In "Kid-Kart Derby", Mitchell cheats by installing an ion drive into his kid kart, but then when he starts to use it, it doesn't work. Jet then informs him that ion drives only work in the vacuum of space. Mitchell still wins the derby, however.
  • Hologram: Ever since "Back to Bortron 7", holograms have been used egregiously on the show. They have been used to deceive the neighbors, show maps of the galaxy, take online classes, and more.
  • Hologram Projection Imperfection: Played straight in "Back to Bortron 7". Jet 2 has to project a hologram of Jet's house, while the real house converts back into a starship for a trip to Bortron 7, so Mitchell doesn't get suspicious. However, Jet 2 has a hard time keeping the hologram stable, as it keeps glitching. Towards the end of the movie, it disappears completely, which gives Mitchell an opportunity to expose Jet (which luckily fails).
  • House Husband: While Celery is always taking the kids to space, Carrot stays home and does things like cooking.
  • Huddle Shot: In "Back to Bortron 7", this happens while Jet, Sean, and Sydney are thinking up ideas to improve the presentation.
  • Human Aliens: The Bortronians seem to be humans, but they treat the human earthlings as though they are members of a different species.
  • Humans Through Alien Eyes: Jet and his family do not seem to get the Earthlings' behaviors and vocabulary, often using them the wrong way. Once, Carrot was shown mowing the roof.
  • I Always Wanted to Say That: Sean says this after saying "There's not a moment to lose!" and "Come on Zerk! Back to the house! And step on it!" in "Back to Bortron 7".
  • "I Am" Song: "Bortronian Is What I Am", written and sung by Jet himself in "My Fair Jet".
    • In "Lone Star", there is "Lone Star", sung by Jet, playing the titular Lone Star.
    • Mindy has "My Name is Mindy".
  • I Ate WHAT?!: Mindy, Sean, and Sydney have this sort of reaction in "Satellite Selfie", where they discover that the cookies that they ate were made from a full cup of minced garlic and rutabaga.
  • I Can't Believe I'm Saying This: In "Back to Bortron 7":
    Sean: I can't believe I'm saying this, but, let's go to Bortron 7.
  • Idiosyncratic Episode Naming: Sometimes. Some episode titles are based around a question ("How Come the Moon Has Craters?")
  • Idiosyncratic Wipes: The show often uses spinning silhouettes of Sunspot for transitions.
  • Idiot Ball: Jet plays out to be this in "Mindy's Weather Report". In that episode, Mindy tells the gang that a storm is on Saturn, and Jet believes that there's a storm in Boxwood Terrace, and tells all the neighbors (including the Petersons) to prepare, despite the number of times Sean, Sydney, and Mindy try to tell Jet that the storm in on Saturn. When the gang goes into space, they see the storm on Saturn and Jet says: "Why didn't you tell me?" with Sean and Sydney in annoyance.
    • Mindy gets passed the idiot ball in "Galileo, Galileo!", where she believes that the sun orbits the Earth, despite the fact that in "Round and Round", she portrayed the Sun and saw that the solar system revolves around the sun, not the Earth.
  • I Just Want to Have Friends: This is most likely Mitchell's Freudian Excuse for why he acts the way he does. It is revealed in "Holidays in Boxwood Terrace" that he is really a lonely kid and he acts like a jerk to hide it.
  • Ill Boy: Sean is a borderline example. He has a sensitive stomach and gets space-sick easily, and if "Just the Right Distance From the Sun" is anything to go by, motion-sick as well. There's also an upcoming Season 2 episode titled "Sean Has a Cold", where it is incredibly likely he will be subjected to a Sick Episode.
  • Imagine Spot: Happens in "More Than One Moon". There are several imagine spots in "Backyard Moon Base".
  • I'm Not Here to Make Friends: In a non reality show example, in the Christmas Episode, Sean asks Mitchell if he wants to join them, saying that "you are our friend", but Mitchell claims "he doesn't do friends". Of course, he's lying.
  • Implied Love Interest: Mindy and Mitchell are heavily implied to have crushes on each other, in episodes like "What Goes Up..." and "Kid-Kart Derby" where Mindy constantly sneaks up on Mitchell and and even tried to ask him out on a date in the latter episodenote  Mitchell acts abrasive towards her in return, especially in "Mindy's Mystery", but "Solar System-Bake Off!" and especially "Detective Mindy" (where Mitchell proposes to her at the end of the episodenote  seem to show that Mitchell does care about Mindy. However, it hasn't been confirmed in the show at all.
  • Incoming Ham: "In the quiet I hear the stars, calling to me from on HIIIIIGGGHHH!!!"
  • Incredible Shrinking Man: This is the plot of "Jet Shrinks the Kids", where Jet shrinks himself, Sydney, Sean, and Sunspot to become Mindy's size. Things go awry, however, and they become the size of mice. Mindy spends the episode trying to reverse the shrink ray, while Jet, Sydney, Sean, and Sunspot try to evade Mitchell and Cody.
  • Incredibly Lame Pun: Face 9000 makes one in "Mindy's Meteorite Stand":
    "And Sean's right, the proper tests will help you discover if your rock is meteorite or meteor-wrong!"
    • He makes another one in "Eye in the Sky":
    "I couldn't tell weather or not you needed my help!"
    • Mindy makes one in "You Can Call Me Albedo" after having just learned what albedo is.
    "Albedo right there!"
  • Inherently Funny Words: Jet considers lots of "Earth words" (like "falafel") to be absolutely hilarious.
  • Innocent Aliens: The Bortronians are very kind-hearted.
  • Innocently Insensitive: Jet means well, but can sometimes do some rather careless things when helping others.
  • Intergenerational Friendship: Jet, Sean, and Sydney, who are possibly in their mid-to-late preteens, are friends with 4-year old Mindy Melendez.
  • Interspecies Romance: In "The Tide is High", Sunspot comes a little too infatuated with a crab at the beach.
  • Intrigued by Humanity: The Propulsions are very interested in humankind, or as they call them, "Earthies", and are always trying to learn their customs.
  • In-Series Nickname: Sean has "Sean-zo", an Affectionate Nickname coined by Jet in season 2.
  • Insistent Terminology: Sean's Neil Armstrong figure is an "action figure", not a "toy".
  • Instant Costume Change: Whenever the group goes into space, Sean and Sydney instantly change from their regular outfits to their space suits.
    • In "Sean's Year In Space", Sean changes into his space suit when he tries to live in the treehouse for a year very quickly.
  • Instant Wristwatch: This happens a lot. At any given moment, Sydney's Commander Cressida watch might randomly appear on her wrist.
  • In Touch with His Feminine Side: Mitchell, perhaps? In a leaked image of "Holidays in Boxwood Terrace", he is shown wearing a lavender dress. Judging by the reaction on his face, he seems to be happy about it.
    • Also, in "Try and Try Again", Mitchell seems to have no qualms about wearing Mindy's lucky helmet...which has rainbows and unicorns on it.
    • Carrot too. Carrot is a stay at home dad, and he likes to cook. He is also revealed to like ballet in "Castaway Carrot", and he briefly wore a pink scarf while admiring himself in a mirror in the same episode.
  • Invisible Parents: Aside from Jet, whose two parents are always present, Mitchell, Sean, Sydney, and Mindy are all confirmed to have both a mom and a dad each, but almost none of them are ever shown. Mitchell's dad is always shown, but Mitchell's mom has only been heard. Sean's mom is always shown, but his dad is nowhere to be seen. Mindy's mom is heard, but not shown, and her dad is also nowhere to be seen. And Sydney's parents have been neither seen or shown, though Sydney's mom appeared in the season 1 finale, and makes frequent appearances in season 2.
  • It's All About Me: Mitchell seems to have a bad case of this as shown in "Kid-Kart Derby". When he wins the soapbox derby, he is the only one cheering for him and even asks anyone if they wants autographs from him, but instead everyone is looking up at and cheering Jet (who was parachuting) even though he lost the derby. Mitchell is the complete opposite of Jet, who is very selfless and tries not to expose his alien identity because he doesn't want to be a celebrity and leave his friends.
    • Also in "Racing on Sunshine", before the race starts, Mitchell boasts that he was "ready to retire", but Cody convinced him to race again. Needless to say, the other racers weren't amused.
    • Mindy, to a lesser extent. "I guess you're just not me".
    • Jet's cousin Zerk. He is a huge braggart as revealed in "Whole Lotta Shakin'", and he also attempted to take credit for the "Just Add Water" in "Back to Bortron 7".
  • It's Always Spring: In this show, it always seems to be summer. Averted in the Halloween 2-parter, where it's fall.
  • Its Pronounced Tro PAY: Though Uranus is often pronounced as "your anus", the characters on this show correctly pronounce it as "your unus".
  • I Work Alone: It isn't said verbatim, but Mitchell usually rejects help from other characters when trying to solve his cases, claiming that he needs to solve his mysteries himself, as shown in episodes like "What Goes Up...", "Kid-Kart Derby", and "Mindy's Mystery". However, this trope averts in "Detective Mindy", where Mitchell actually lets Mindy help him.
    • In the Christmas Episode, Mitchell claims that he "doesn't do friends". He's lying, of course.
    • Even after the Christmas Episode, Mitchell still rejects help from the kids in "Racing on Sunshine" and "You Can Call Me Albedo", but both instances stem from Mitchell's overconfidence in being a detective rather than outright hatred for the clique.
  • Jabba Table Manners: Zerk. In "Back to Bortron 7", he asked the group if they wanted to see how many Figinnuz he could fit into his mouth until his mom stopped him.
    • All the kids exhibit this in "Mindy Turns Five". At Mindy and Lillian's tea party, the kids put the teacups on their heads, and Jet grabs things using his feet.
  • Jaw Drop: Sean does a major jaw drop in "Space Race", after Zucchini uses his new thrusters in the titular race.
    • Carrot does one in "Back to Bortron 7" after Eggplant informs him and Celery that they'll be done with Earth after their presentation. For dramatic effect, the Exploding Shake that Carrot was holding explodes in his face.
  • Jerk: Mitchell, obviously.
  • Jerk with a Heart of Gold: Though Mitchell has his many jerky moments, Mitchell is otherwise nice in his early appearances
  • Jerkass Façade: Mitchell hides behind one as revealed in the Christmas Episode. Mitchell acts mean to Jet and his friends, and Mitchell claims that he "doesn't do friends", but Mitchell isn't really mean, he's really just a lonely kid who wants to join Jet's clique, but doesn't know how to fit in. Fortunately, he gets his happy ending.
  • Jerkass Has a Point: In "Lone Star", Western!Sean is a cranky shopkeeper who dislikes Lone Star's ideas because they actually could hurt the economy of Boxwood Territory. Western!Sean claims that if people are looking up at the stars all night, they will be tired in the morning and won't be able to cut down trees or dig for gold.
  • Jet Pack: Jet has one. He uses in a few episodes like "Mindy's Moon Bounce House" and "My Fair Jet".
  • Karma Houdini: Mitchell tried to get intel about Mindy's recipe in "Solar System Bake Off" and cheated at a race in "Kid Kart Derby", but he never gets punished for this.
    • In "Asteroid Belt Space Race", Eggplant and Zerk cheat in the race by using anti-gravity fluxinators (which effectively steal gravity from the other racers), yet they win and don't get their comeuppance.
  • Keet: Jet is this to the extreme.
  • Kid Detective: Mitchell is always trying to be a detective and find proof that the Propulsions are aliens. In "Detective Mindy", Mindy becomes Mitchell's detective partner.
  • Kissing the Ground: Sean often does this whenever they get back from space. A few times, this is coupled with him spitting out grass.
  • Know-Nothing Know-It-All: Zerk proves to be this in "Asteroid Belt Space Race". After he learns just a little bit about asteroids from Sean and Sydney, he declares that he is an asteroid expert when he actually isn't.
  • The Lancer: Sean is this to Jet.
  • Large and in Charge: Jet is the tallest and is the leader of his group.
  • Large Ham: The song number in "A Visit to the Planetarium" proves that Jet is this. You can listen to the song here.
  • Laser-Guided Karma: In "Whole Lotta Shakin'", Zerk keeps bothering Jet, Sean, and Sydney to no end via Jet's smartwatch. At the end of the episode, Zerk annoys Jet again, and gets what he deserves after Jet throws the smartwatch into the vastness of space.
  • Last-Name Basis: Mr. Peterson refers to males by their last names, using Peterson to refer to his own son, and Propulsion to refer to Carrot and Jet.
    • In "Mini-Golf At The DSA", he refers to Dr. Rafferty as simply Rafferty.
  • The Last of These Is Not Like the Others: Happens in "Detective Mindy":
    Sydney: How does [the black hole] do that?
    Mindy: And how did it get there?
    Jet: And how does my hair look today? (beat) Oh...not the right time?
    • This happens again in "Galileo, Galileo!", where Sean is listing his heroes: Galileo Galilei, Neil Armstrong, Albert Einstein, Madame Curie, and Patti Smith.note . Even Sunspot seems confused.
  • Laughing Mad: In "Detective Mindy", Jet looks for a black hole in the trash can. He puts it over his head and starts laughing like a madman.
  • The Leader: Jet is the leader of his group.
  • Leitmotif: "My Name Is Mindy" for Mindy. If you listen closely, you can hear an instrumental playing when she's around sometimes. Sydney's is the Commander Cressida theme song. Sean's is the Scientific Method, and Jet's is the theme song.
  • Let's Duet: Some. "Let's Fly Our Little Saucer to the Moon", "There's No Planet Like My Planet", and "Enceladus vs. Europa".
  • Licensed Game: Theres an app for this show called Space Explorer that uses augmented reality technology to help you learn about space.
  • Lightbulb Joke: Beep tells Jet one of these jokes in one episode.
  • Limited Social Circle: Jet, Sean, Sydney, Mindy, and Sunspot are very close-knit and never seem to talk to any other kids. Lillian only appeared in one episode (and another one as a cameo), and Mitchell is their frenemy. Although they did reassure Mitchell that they're his friends in the Christmas Episode.
  • Limited Wardrobe: Almost every character. Though Sydney and Sean wear the same suits as the Propulsions while going into space.
    • The characters (save for Mindy), don't even wear pajamas when they go to sleep! Now that's gotta take the cake.
  • List Song: This show loves this trope, "So Many Moons!", "Solar System Song", "Night of a Bazillion Stars", etc.
  • Literal-Minded: Jet's parents' learning curve is filled with funny misunderstandings of the human ways of things, and both kids and parents will have a lot of fun watching them get the hang of "throwing a salad together" and understanding the "string" part of beans. Their Amelia Bedelia-like follies are good for some laughs, but they also reflect the challenges of immersing yourself in a culture that's different from your own. This exchange from "Tiny Blue Dot" is just one example of many:
    Sean: Ohh, I think I left my stomach on Venus.
    Celery: Ooh, should we go back for it?
  • Little Miss Snarker: Mindy is this in spades.
  • Loner-Turned-Friend: Mitchell was previously a Shrinking Violet loner with a Jerkass Façade, who wanted to join Jet's clique but didn't know how to fit in. However, once he sings with them in the pageant, he gets to belong to the group. Sydney and Mindy reassure him that he can always be a part of whatever the clique is doing. So Mitchell is technically now part of Jet's circle of friends.
  • Lookalike Lovers: Carrot and Celery look exactly alike. Are we sure they're not siblings?
  • Loophole Abuse: At the end of "Solar Power Rover", Jet makes some solar powered lanterns, and puts them in the background. Celery then comes and tells him its time to go to bed, since it's getting dark. But because of the lanterns, it will be bright all night.
    • In "A Visit to the Planetarium", Sydney and Sean say that Jet can't say he's from Bortron 7. Jet sings a song at the planetarium and mentions Bortron. However, he never said he was from Bortron 7.
  • Mama's Boy: Sean, considering how we never see his dad, and how close he is to his mom.
  • The Man in the Moon: In "More Than One Moon", Sydney tells the story of the Man in the Moon to Mindy.
  • May I Borrow a Cup of Sugar?: In the episode "Solar-System Bake Off!", Mitchell goes to Jet's house and asks for a cup of sugar, but really, he wants to gather information about his (speculated) crush Mindy's baking contest entry.
  • Meadow Run: Parodied in "The Tide is High". When Sunspot encounters his crab friend again, he runs towards him in slow motion, complete with dramatic music. However, the crab just stays where it is and goes in a different direction.
  • Mean Character, Nice Actor: In "Lone Star", Sean plays a Jerk Ass shopkeeper who doesn't believe Lone Star. However, Sean wouldn't hurt a fly in real life.
  • Meaningful Name: Jet is named after the Jet Propulsion Laboratory, who helps out with this show.
    • Sydney's last name, Skelley, means "storyteller". Which relates to how Sydney is imaginative and likes to tell stories.
  • The Mentor: Face 9000, who knows everything about science, and often pops up to answer the kids' questions.
    • Dr. Rafferty, Dr. Bergs, and Dr. Skelley are also this.
  • Men Use Violence, Women Use Communication: In "The Plant From Bortron 7", Sydney assumes that the giant plant has a head, and offers a peaceful solution to the problem by wanting to talk to the plant. But Sean offers a violent solution by wanting to get a big pair of clippers and snip the plant. They keep arguing about it until the plant runs away, most likely because of Sean wanting to snip the plant.
  • "Metaphor" Is My Middle Name: In "Total Eclipse of the Sunspot", Jet claims that "Super Smart" is his middle name.
  • Midseason Upgrade: In "Face on the Fritz", Face gets an upgrade and a new 3D-ish design.
    • Technically not in the middle of the season, but in the actual season 2 premiere, "Souped-Up Saucer", Celery upgrades the saucer so it has new features, including a robot arm.
  • Mini-Golf Episode: The season 2 episode "Mini-Golf at the DSA" has the Deep Space Array install a mini golf course. The kids compete against the adults in the DSA's first mini-golf tournament, and they win by applying their knowledge of force.
  • Missing Mom: Mitchell's mom has never been seen, though his dad is always shown.
    • Mitchell's mom was actually heard talking to Mitchell in "Mindy's Moon Bounce House", but wasn't seen. And she was mentioned in "Detective Mindy".
  • Moral Guardians: Some parents are not letting their kids watch this show due to Jet's friends lying to avoid people finding out about his alien identity.
  • The Movie: In August of 2017, the show premiered its own TV Movie entitled "Ready Jet Go!: Back to Bortron 7", as part of the PBS Kids "Summer Adventure" initiative in order to bridge the summer learning gap. The special focuses on the Propulsions needing to go back to their home planet in order to do a presentation of everything that they've learned. Sean and Sydney's parents are out of town, so Sean and Sydney get to stay with the Propulsions, and of course, go to Bortron 7 with them.
  • Ms. Imagination: Sydney is this.
  • Mr. Fixit: Jet is pretty handy with tools, as he was able to fix the satellite in "What's a Satellite?"
  • Multicolored Hair: Eggplant has several blonde streaks in her hair.
  • Multi-Part Episode: Several:
    • "Sunday Drive", where everything goes out of whack after the Propulsions download the new version of the saucer dashboard software.
    • "Jet's First Halloween", the Halloween Episode.
    • "Holidays in Boxwood Terrace", the Christmas Episode-Musical Episode-Wham Episode epic combo.
    • "Mindy Turns Five", where Mindy finally gets to go to space.
  • Mundane Object Amazement: Jet is constantly fascinated by the most simple of Earth objects, such as drinking fountains.
  • Musical Episode: The episode "Tiny Blue Dot", which puts a lot of emphasis on the 3 original songs.
    • The episode "Lone Star" is a Western-flavored musical.
    • "Back to Bortron 7", despite not being marketed as such, turned out to be a musical, with a whopping eight songs.
    • "Holidays in Boxwood Terrace" too, justified as its about the kids putting on a Christmas pageant.
  • Must Have Caffeine: Dr. Bergs. He is almost never seen without a cup of coffee in his hand. It even gets lampshaded in "Comet Fever".
    Sean: You have enough coffee for an army.
    Dr. Bergs: An army of one, my friend. An army of one.
     Tropes N to Z 
  • Named After Their Planet: The Bortronians are named after Bortron.
  • The Name Is Bond, James Bond: This is how Jet introduces himself to Dr. Bergs in "Visit to Mom's Office".
    Jet: Propulsion, Jet Propulsion. How d'ya do, sir?
  • Nice Guy: The PBS Parents website has confirmed that all Bortronians are perpetually cheerful and friendly.
  • Nice Hat: Mindy has a bear hat, and Mitchell has a detective hat.
  • Nerd Glasses: Mitchell has these glasses.
  • Never a Self-Made Woman: Played with. The adult women in this show seem to all have successful jobs, especially Dr. Rafferty.
  • Never Bareheaded: Mindy and Mitchell are never seen without hats on. They even wore hats as part of their Halloween costumes in "Jet's First Halloween", and Mindy even wears a hat when she goes to sleep.
  • Never My Fault: In "Racing on Sunshine", the kids have to design solar-powered karts for the annual kid-kart derby. During the race, it gets cloudy. Jet and Sydney have batteries installed in their kid-karts so they can use the sun's energy later, but three-time champion Mitchell got too overconfident in winning the race, and did not think to use the battery. He ends up coming in at 3rd place, and he blames the clouds blocking the sun instead of his own carelessness.
  • Never Say "Die": In "How We Found Your Sun", Sydney tells the story of Icarus to Sean, but instead of saying that he died, she just says he "fell to Earth".
  • Never Trust a Title: You would think that the episode "Asteroid Patrol" would be about the kids trying to look for asteroids from the treehouse. In the episode, Sean does set up an asteroid watch station in the treehouse, and gets the rest of the clique involved, but most of the episode revolves around Jet trying to fix Sean's telescope.
  • No Antagonist: Even though Mitchell always spies on the group, he is not really an antagonist.
  • No Flow in CGI: This show plays with this trope. In the earlier episodes of the show, the characters had blocks for hair and skin-tight clothing due to the low-quality CGI. However, in the later episodes (starting with "Solar System Bake-Off!"), the characters have a better flow. For example: Mindy's pigtails move and bounce freely even with the slightest movements of her head in the latest episodes.
  • Noodle Incident: In "My Fair Jet", Jet rhetorically asks if he's ever made a mistake. Sunspot then shows him some pictures of mistakes he's made in the past on his tablet. The giant runaway plant from "The Plant from Bortron 7" was brought up, but two other incidents (a "porcupine jumping contest" and a "maple syrup catapult") were brought up. Jet, at the very least, seems embarrassed by those incidents, and we have yet to learn exactly what went down in those events.
  • Non-Standard Character Design: As opposed to the huge, shiny, semi-circle eyes that most of the characters have, Mr. Peterson has tiny eyes. It makes him stick out like a sore thumb amongst the cast.
  • No Social Skills: Mitchell in the episode "Solar System Bake-off!" When he spies on the gang in order to gather information, he acts awkward and almost robotic around them, especially around Mindy. Before he entered the house, he was even thinking of what he should say to them.
    • He also acts especially shy when Mindy compliments his rocket cake.
  • Not Allowed to Grow Up: Averted, in "Mindy Turns Five", she obviously turns five and is allowed to go to space.
  • Nothing Is the Same Anymore: The show's dynamic was changed forever in the season 2 episode "Mindy Turns Five", where, you guessed it, Mindy turns five years old and is now allowed to go past Jet's yard by herself. In other words, Mindy is now allowed to go to space with the older kids.
  • Not So Above It All: Sean becomes more excited about going into space with the others in more recent episodes, despite him wanting to go the space the traditional way.
    • Mitchell acts like he is a better detective than Jet and his friends, but he still attends Mindy's concert at the end of Mindy's Mystery.
  • Not-So-Innocent Whistle: In "Detective Mindy", Mr. Peterson finds his wife's sunglasses, only for them to be broken. He almost goes to the mall to get another pair to replace them (even though he doesn't like shopping), but Sunspot gives Celery's sunglasses to Mr. Peterson instead. Seconds later, Celery asks if anyone has seen her sunglasses, and Sunspot starts whistling.
  • Numbered Homeworld: Bortron 7 is one of many Bortrons.
  • Odd Friendship: Sean and Sydney are complete opposites: Sean is crazy about science facts and dreams of one day leading the first human mission to Mars, but is afraid of cramped spaces and likes everything to be his way. Sydney is obsessed with science fiction and dreams of one day being a great science-fiction author, and she is totally okay with being in space and with changes. They are also best friends with a little girl named Mindy, who knows nothing about science, yet is curious about everything. They all befriend Jet, who turns out to be a space alien, and completely changes all of the kids' lives.
  • Official Fan-Submitted Content: An In-Universe example in "Commander Cressida Story Contest". The prize for winning the titular story contest is to have your story in an official Commander Cressida comic.
  • Oh, Crap!: Many times, usually by Sydney and Sean whenever Jet does something stupid or is about to expose his alien identity.
    • Sean occasionally, whenever they go into space.
    • This is Mindy's reaction when the house hologram completely disappears in "Back to Bortron 7".
  • Older Than They Look: Jet looks like a tween, but "Earthday Birthday" reveals that he's really 63 (Bortronian) years old.
  • One Head Taller: Mitchell is roughly a head taller than Mindy, and he possibly has a crush on her.
  • Only Child Syndrome: Every single kid in this show is an only child. However, "So Many Moons" mentions that Mindy might be getting a sibling.
  • Only One Name: Sydney is the only main character who doesn't have a last name. Until the episode "Commander Mum", where her last name is revealed to be Skelley.
  • O.O.C. Is Serious Business: In "Not a Sound", Sydney, Sunspot, Jet, and Celery are taken aback when Sean says he wants to go to space.
  • Orange/Blue Contrast: Many examples. Bergs wears an orange shirt and blue jeans, and his orange shirt also contrasts with Dr. Rafferty's blue shirt. Sunspot's orange fur contrasts with Moonbeam's blue fur. And Mindy wears an orange shirt and blue denim shorts.
  • Origins Episode: The beginning of "How We Found Your Sun" reveals how the Propulsion family found Earth.
    Well, my mom and dad are, um, how would you say— they write true stories about traveling and exploring around the galaxy. And we were flying across this part of the galaxy, looking for nice, life-friendly planets to visit and write more stories about. And way out in the middle of nowhere, we picked up this primitive radio signal from Earth that had been traveling across space, so we figured you'd still be here. It was a song... and a catchy one! We knew that whoever was out there at the other end of the signal would be life friendly and have a good sense of rhythm. So we followed the radio signal. That's how we found your star, the Sun!
    • In a way, "Commander Cressida Begins" acts as one for the In-Universe fictional character. Sydney and Mindy read the first ever issue of the comics, where they see how Cressida used to be a farm girl in Indiana and how she built a rocket and became a commander.
  • Out-of-Character Alert: In "Date Night", Sean helps recreate Celery and Carrot's anniversary by going with the others to Saturn's moon Mimas. Something that surprised Jet's parents since they know Sean's always reluctant to go into space.
  • Out of Focus: "Commander Cressida Begins" has Jet, the main character of the show, reduced to a non-speaking cameo, making it the smallest role he has ever had in an episode so far.
  • Overly Narrow Superlative: In the episode "Holidays in Boxwood Terrace", Jet calls Mitchell "the best detective he knows". Mitchell is the only detective Jet knows, and Jet even lampshades it.
  • Pass the Popcorn: In "Sean's Year in Space", Sunspot briefly eats popcorn while seeing how long Sean can last in the treehouse.
  • Pen Pals: In "Mindy's Bedtime", it is revealed that Sydney has an Indian pen pal named Ahana. Since it is night in India and when it is day in Boxwood Terrace and vice versa, Sydney and Ahana email each other.
  • Performance Anxiety: Sean gets this in the second half in "Holidays in Boxwood Terrace" when he's about to sing his song about the Spirit of Christmas, and he realizes that everyone is looking at him.
  • Pet the Dog: Mitchell isn't exactly the nicest character on the show, but the episode "Detective Mindy" shows that he can be nice. He is nicer towards Sean, Sydney, Jet, and especially Mindy in that episode, and forms some sort of bond with Mindy after they solve the mystery of the missing sunglasses.
  • Pinch Me: In "Space Junk", Sean is flying outside the saucer, collecting garbage, with a guy named Zucchini. He then asks Sunspot to pinch him, which he does.
    • This also happens in "Whole Lotta Shakin'".
  • Pink Girl, Blue Boy: A Christmas promo for PBS Kids included some clips of "Holidays in Boxwood Terrace". Sean wears a blue jacket and Sydney wears a pink jacket.
  • Pink Means Feminine: Mindy's friend Lillian wears a big pink bow on her head.
  • Playing Sick: In "Mindy Pet-Sits", Sean, Jet, Sydney, and Carrot fly out to space in order to look for the Northern Lights. Since Mindy is too young, she cannot go, and she is sad that she cannot go to see the Northern Lights. Sunspot, feeling sorry for her, fakes an injury so he gets to stay with Mindy, and make Mindy her own Northern Lights show in the backyard. All of the other characters are aware of this.
  • Pluto Is Expendable: The show didn't mention Pluto at all until an In-Universe moment of Anachronism Stew happens during "A Trip to the Planetarium" in which Pluto is still listed as a planet in the planetarium show. The controversy surrounding Pluto does get touched upon briefly when Sydney points out that the film was made before Pluto's demotion.
    • They had an entire episode where the kids debate whether Pluto is a planet or not.
  • The Pollyanna: Jet. You can't get him down, and he always finds a solution for the problems the kids face.
  • Portmanteau: In "Back to Bortron 7", when the group is leaving Bortron 7, there are tons of TV screens that feature Sean saying "Booyah, science!" during his interview after the group successfully convinced Carrot and Celery's boss to let them stay on Earth for another season. Sean's response......coolsome (a portmanteau of "cool" and "awesome")
    • "Coolsome" was also used egregiously in "Mindy in Space".
  • Positive Discrimination: This is one of the show's major flaws. The women in this show (Sydney, Mindy, Celery, and Dr. Rafferty), are the most sensible and competent characters on the show. They succeed at everything, and are rarely the butt of anyone's jokes, unlike the men in this show (Jet, Sean, Carrot, and Dr. Bergs) who are portrayed as dumb compared to the women and tend to be the butt of everyone's jokes. It doesn't help that Mindy and Sydney are Token Minorities.
  • Power Walk: In "Mindy's Meteorite Stand", the kids do this type of walk on the way to Jet's garage. Even the music that plays during that scene is awesome.
  • Precision F-Strike: In "Back to Bortron 7", when Zerk is introduced in person, he actually says "Oh my God!"
  • Precocious Crush: It's really easy to think that Jet has a crush on Sean's mom as of "Visit to Mom's Office". When he first sees her, he immediately gives her a big hug (Sean's mom looks surprised, Sean looks annoyed, and Sydney looks sad, since she has frequent ship tease with Jet and possibly likes him), and even calls her "Dr. Sean's Mom" even though he knows that their last name is Rafferty. He is later seen smiling widely at her and raising his eyebrows trying to catch her attention, which also made Sydney upset. To top it off, he seemed all too excited to tell her that he is from Bortron 7. This crush can also be seen in other episodes. In "Ice Moon Enceladus", when Dr. Rafferty is passing by Sean's snow cone stand, Jet immediately greets her, even though she ignores him, and in "Mindy's Meteorite Stand", when Dr. Rafferty was inspecting Mindy's "meteorite", Jet also looked through a magnifying glass to impress her.
    • In "Asteroid Patrol", Sean's telescope needs adjusting and Jet happily offers to go to Sean's house to get some items. Of course, when he sees Sean's mom, he acts awkward around her.
    • In "Face on the Fritz", Jet takes a selfie with Dr. Rafferty's phone and then gives it back to her in embarrassment.
    • However, in later episodes, the crush is no longer apparent.
  • Pride: In "Racing on Sunshine", Mitchell, the three-time kid kart derby champion, rejects help from Jet because he is sure that he will win. His overconfidence causes him to not think and forget to install a battery in his solar-powered kid-kart, and he ends up losing the derby because of it.
  • Primal Fear: Sean is afraid of heights and being in tight spaces.
  • Punctuated! For! Emphasis!: Jet being bummed out over having to test out the hover-scooters.
    Jet: Worst. Chore. Ever.
  • Puppy-Dog Eyes: Jet and Sunspot make these eyes at Sean and Sydney in "A Visit to the Planetarium" in order to convince them to let them go the planetarium show.
  • Pushed in Front of the Audience: In "Holidays in Boxwood Terrace", Sean gets Performance Anxiety, and Mitchell just happens to be singing Sean's song backstage. So, Jet pushes Mitchell in front of the audience, and pulls Sean offstage.
  • Questioning Title?: Used as an episode naming convention.
  • Rain, Rain, Go Away: Happens in "Eye in the Sky". Sean plans a sleepout under the stars for his space scout troop, but the rain ruins his plans.
  • Redhead In Green: Eggplant and Zerk are both redheads, and they both have green space-suits.
  • Red Herring: The episode Detective Mindy has Mrs. Peterson's sunglasses go missing, and Mitchell, being a detective, naturally tries to find out where his mother's sunglasses went. Mindy, Sean, Sydney, Sunspot, and Jet all get involved in this mystery, too, one by one. Mr. Peterson said the kitchen counter, where Mrs. Peterson lost her sunglasses, was like a black hole, which causes all the kids to believe that the kitchen counter really is a black hole, and they waste their time trying to find an actual black hole. In the end, it is revealed that Mr. Peterson was just using an expression.
  • Red Oni, Blue Oni: Jet is the Red Oni, Sean is the Blue Oni. Jet is hyperactive, leaps before he looks, and is very energetic and enthusiastic. Sean is more nervous, intellectual, and calm. During Sean's dream sequence in "Back to Bortron 7", Jet even stands in front of a red sphere and holds a pink one, while Sean stands in front of a blue one and holds a purple one.
  • Retcon: Many examples. For example, the kids mention having a treehouse in "Jet 2", but they build the treehouse in the later episode, "Treehouse Observatory". This is due to PBS airing the episodes out of production order.
  • Ridiculously Cute Critter: Sunspot.
  • Robinsonade: In "Castaway Carrot", Carrot gets stranded on the moon.
  • Robot Buddy: Jet 2, and later, his companion, Sydney 2. Face 9000 also qualifies.
  • Rubber-Forehead Aliens: The Bortronians look exactly like humans, but have stretchy bodies and very thin faces.
  • Rule of Symbolism: According to Craig Bartlett, each one of the main child characters is supposed to represent an important factor of science, given the show's science curriculum.
    • Sydney represents the power of imagination in science. Sydney is obsessed with science fiction and comics, and idolizes a character named Commander Cressida. She is very imaginative and likes to think creatively in situations, as well as create her own fanfictions about Commander Cressida in the treehouse. She correctly states that science-fiction ideas have inspired many technological innovations and advances, that scientists are as inspired by what they saw on Star Trek as anything in a scientific journal.
    • Sean represents science facts. In contrast to Sydney, who likes fiction, Sean is all about the facts. Sean likes to do things the old-fashioned way and does not like change as much as the others do, and he's got a hard time using his imagination as shown in "Backyard Moon Base", however he does come from a family of scientists AND astronauts, so he figures he's going to be a great scientist himself, and likes to use the Scientific Method to solve problems. He also wants to lead the first human mission to Mars, despite the fact that he gets space-sick easily, is afraid of cramped spaces, and has a fear of heights.
    • Mindy represents curiosity. Mindy was originally not in the show, according to the producers. But after testing the initial pilot with children, the producers decided to add Mindy in to have a character for the younger set to look up to as a role model, since this show is more for older kids. Mindy doesn't know a whole lot about science, and is far too young to go into space with the others, but she’s welcomed into the group, treated as an equal, and never talked down to. Mindy is often the reason for the episodes' plots. Due to her curiosity, she often asks a basic, kid-friendly question about space which prompts the kids to look for an answer, either by going into space or by staying on Earth.
    • And rounding out the main cast of children, we have Jet Propulsion, who is the coolest kid ever, and an ambassador for space. Jet embodies what the other children represent. Jet is creative, and being from outer space, and having travel-doc parents, he knows a whole lot about it, and he's very curious to learn about Earth and its customs. Jet also represents how the creators of this show want the target audience to see Earth: with a sense of curiosity and wonder. Jet is continuously amazed by our lush and beautiful planet, and as such, wants to protect it, since it is his current residence. The episode "Tiny Blue Dot" proves this.
  • Running Gag: Mindy not being able to go into space due to not being allowed to go anywhere past Jet's yard.
    • The Propulsions messing up on Earth words and traditions.
    • Jet almost exposing his identity.
    • Sean being nervous when going into space.
    • Sean singing the Scientific Method.
    • Mitchell spying on Jet.
    • Sunspot being silly and functioning as a Deus Ex Machina.
    • Carrot making weird dishes.
    • The show having a comic book motif and using comic book transitions.
  • Samus Is a Girl: A variant occurs in "Solar Power Rover". Sean's "pet" rover, "Shep" was referred to with male pronouns. After Jet suddenly become fluent in rover-speak, he talks to "Shep" and reveals that he is actually a she, and her name is Beep.
  • Sanity Slippage: Played for Laughs in "Castaway Carrot". Carrot goes insane while stranded on the moon. He attempts to farm pizza on the moon, and gets lonely so he draws pictures of Jet, Celery, and Sunspot on some moon rocks. He even briefly makes out with the Celery rock!
  • Say My Name: In "Total Eclipse Block Party", everyone yells "SUNSPOT!" after they discover that he stole the eclipse countdown clock.
  • Scout Out: Sean is a part of a scout troop called Space Scouts, as shown in "Eye in the Sky". Their business isn't selling cookies or popcorn though, their business is learning about science.
  • Secret Chaser: Mitchell.
  • Secret Identity: The Propulsions are secretly aliens from the planet Bortron 7, and are trying to keep a low profile on Earth or else they could become celebrities, and Jet would never get to play with his friends again (as pointed out in Visit to Mom's Office). Their alien identities are only known to Sydney, Sean, and Mindy.
  • Secret Keeper: Sydney, Sean, and Mindy.
  • Security Cling: Jet jumps into Sunspot's arms at one point in "Sunday Drive".
    • Sean and Carrot do this to each other in a few episodes, like "How Come the Moon Changes Shape?" and "Which Moon is Best?"
  • Sentimental Music Cue: In "Jet 2", somber piano music starts playing when Jet discovers what jealousy is.
  • Sequel Episode: "Asteroid Belt Space Race" is a sequel to "Space Race", as it focuses on the rematch that Celery and Zucchini promised to have at the end of the latter episode, this time with Eggplant and Zerk involved.
    • "Racing on Sunshine" is a sequel to "Kid-Kart Derby", and takes place one year after said episode.
    • An upcoming Season 2 episode is titled "Lone Star 2", which is guaranteed to be a sequel to "Lone Star".
  • Series Continuity Error: See Retcon above.
  • "Shaggy Dog" Story: In "Project Pluto", Mindy wants to make a model of Pluto for show-and-tell at school, but then the other kids tell her that Pluto is no longer a planet. Then, the older kids go to the DSA and have a debate with the scientists on whether Pluto should be considered a planet or not. Then, the kids are forced to go home and tell Mindy that Pluto truly is no longer a planet, (which could have lead to an emotional ending with An Aesop) but then discover that Mindy has already accepted the fact that Pluto is no longer a planet and has made a model of Saturn instead.
  • Shipper on Deck: The older kids seem to largely support Mitchell/Mindy as of Detective Mindy. They cheered wildly when Mitchell "proposed" to Mindy, Jet was largely interested in the fact that Mindy was working with Mitchell to solve a mystery, and Jet invited specifically Mindy and Mitchell to the treehouse in the Halloween special.
    • The kids love it when Mr. and Mrs. Propulsion do something romantic.
  • Ship Sinking: Craig Bartlett stated in a Reddit AMA that Mitchell and Mindy would just be friends, which sank the Mitchell/Mindy ship to the lowest depths of the ocean.
  • Ship Tease:
    • Sydney and Jet danced together at the end of "How Come the Moon Changes Shape?", and Sydney hugged him in "Kid Kart Derby". Also, in "Tour of the Solar System", Sydney asks why she was chosen to be Venus, and Jet says that Venus "is the brightest planet in the sky." Then, they skated together on one of Saturn's rings in "What's Up With Saturn's Rings?".
      • They nearly held hands at one point in the Just Add Water number in "Back to Bortron 7", but Celery obscured the view.
      • In the Christmas Episode, Jet casts Sydney as Mrs. Claus in the pageant. Sydney then says "Sounds good, Mr. Claus", in a very flirty tone.
    • Mindy is constantly sneaking up on Mitchell whenever he is spying on Jet, in episodes like "Solar System Bake Off", "Kid Kart Derby", and "What Goes Up...". Also in Mitchell's debut episode, he watches Mindy very intently. In "Detective Mindy", Mitchell lets Mindy be a detective with him, and they bond after solving the case of the missing sunglasses. At the end of the episode, Mitchell gets down on one knee to propose that this is the beginning of a beautiful friendship for him and Mindy. . Cue the older kids cheering after he says that. In "Mindy's Mystery", Mitchell was mostly mean to Mindy and her friends, but then he is shown at the end of the episode at Mindy's concert.
  • Shiny-Looking Spaceships: The flying saucer is very shiny.
  • The Show Must Go On: In "Holidays in Boxwood Terrace", Sean gets Performance Anxiety right before he sings his big finale song, but Mitchell takes over for him and the pageant continues.
  • Shown Their Work: This show has a production team composed of people with great track records for cartoons, and more importantly, astronomers like Amy Mainzer. This helps them to convey verifiable information about space and science in every episode.
    • In just one example, in "Earthday Birthday", Face 9000 says that Mindy would be almost 17 years old on planet Mercury. Mindy is 4 years old on the show. If you multiply 4 by 365 (the number of days in an Earth year), you get 1,460. Divide that by 88 (the number of days in a Mercury year), and you get 16.5909090909. So, yeah, Face 9000 was correct.
  • Show Within a Show: "Commander Cressida", the kids' favorite show. Also, the Bortronian hit show, "Bortron Chef".
  • Shrink Ray: In "Jet Shrinks the Kids", Jet builds a shrink ray so he, Sean, Sydney, and Sunspot can become small like Mindy. It can also be used as a grow ray when reversed.
  • Sibling Rivalry: Face and Data-Box
  • Sick Episode: "Endless Summer" for Carrot.
    • The upcoming Season 2 episode "Sean Has a Cold" is very likely going to be one.
  • Signature Laugh: Jet's "HA-HA-HA-ha-HA!"
  • Singing in the Shower: In "Holidays in Boxwood Terrace", Sean reveals that he sings a lot....in the shower.
  • Singing Voice Dissonance: In "Holidays in Boxwood Terrace", Mitchell's singing voice is very high-pitched compared to his regular voice. The reason being is that Mitchell had a separate VA for his singing voice.
  • Skyward Scream: Mitchell screams Jet's full name at the end of "What Goes Up...", after proclaiming that he will figure out Jet's alien identity one day.
    • Mitchell screams at the sky again at the end of "Pet Sounds".
  • Slice of Life: For the most part, the show is this, but a better way to descriebe it is that it's a sci-fi slice of life show.
  • Slow Motion: This is used when Beep the Rover jumps across the Mars Yard in "Beep and Boop's Game"
  • Slumber Party: The kids have one in "Night of a Bazillion Stars".
  • The Smart Guy: Sean.
  • Smart People Wear Glasses: Plenty of smart people on this show wear glasses, like Dr. Rafferty, Dr. Bergs, and Mitchell
  • Smite Me, O Mighty Smiter!: In "Jet Can't Sleep", the Propulsion family is playing charades. In one round, Celery pretends to be sleeping. Carrot guesses a coffee table, but then Sunspot correctly guesses that Celery is sleeping. Carrot then remarks that he was gonna say that. Carrot says: "If I wasn't, may lighting strike me!" Then lightning flashes in the sky, and Carrot jumps into Jet's arm. Carrot then remarks that tonight isn't a good night to say that.
  • Sneeze of Doom: In "Endless Summer", Carrot gets sick, and his sneezes are practically deadly.
  • Snowball Fight: Sean, Sydney, and Jet have one in the beginning of "Holidays in Boxwood Terrace"
  • Sound Off: In "Earth Camping":
    I don't know but I've been told (x2)
    Camping songs will never get old! (x2)
  • Space Is Cold: Constantly gets brought up in "From Pluto With Love".
  • Space Is Noisy: Averted to hell and back in "Not a Sound". Jet and Sydney are convinced that there are sounds in space, but then they learn that there isn't. However, they can still hear each other through their helmets, but only because there is air in their helmets.
  • The Speechless: Sunspot does not talk, instead he uses various sound effects to communicate.
  • Spell My Name with an "S": Many, many, MANY people spell Sydney and Sean's names as "Sidney" and "Shawn/Shaun" respectively. Some people also call Sydney "Cindy". A few people refer to Mindy as "Mindi".
    • Even PBS themselves claim that Mitchell's surname is "Petersen", even though the show's credits literally spell it as "Peterson".
  • Spinning Paper: In "Mindy's Meteorite Stand", as meteorite fever grips the neighborhood, a spinning newspaper is shown with Mindy's portrait on it.
  • Spiritual Successor: The show is one to Sid the Science Kid, as both shows are PBS Kids shows that have a STEM curriculum, and both shows star four kind-hearted, cute, curious children who just want to learn about science. It also helps that the creator of the show worked on Sid as a story editor, and Jet premiered 8 years after Sid.
  • Split-Screen Phone Call: Jet has this with Carrot and Celery in "The Plant From Bortron 7".
  • Spoiled Brat: Mitchell is a downplayed example of this trope. In "The Grandest Canyon", when he and his father look at the Propulsions' pictures of Valles Marineris, Mitchell whines that the hats that the group wore in the picture were not at the store that was at the canyon that the Petersons went to. Also, in "Mindy's Weather Report", Mitchell whines that the sandbags are too heavy, and his father spoils him by carrying his sandbag for him.
  • Spoiler Title: Guess what happens in "Mindy Turns Five".
  • Stalker with a Crush: A rare example in which both the stalker and the crush are this to each other. Mitchell is the stalker first. In his debut episode, "Mindy's Moon Bounce House", Mitchell watches Mindy, his (speculated) crush through a pair of binoculars. Later, in "Solar System Bake-Off!", Mitchell attempts to spy on Mindy and her baking contest entry, and acts rather awkward around her. Mindy then becomes the stalker starting in "What Goes Up...", where Mindy sneaks up on Mitchell several times throughout the episode. It would then become a Running Gag which would appear in "Kid Kart Derby" and "Detective Mindy", where Mitchell more or less warms up to her. Then in "Mindy's Mystery", Sean and Sydney actually more or less help Mindy to stalk Mitchell! (Then again, all they were doing was trying to track the source of the mystery smell from Mitchell's yard)
  • Status Quo Is God: The show for the most part avoids this, especially with its large amounts of continuity and Wham Episodes. However, in the season 1 finale, "Commander Mom", Dr. Skelley rebuilds Jet 2 into Jet 3, only for him to return to his normal form in season 2.
  • Stock Footage: Face 9000 shows the real life Apollo 11 launch in "Earth Mission to Moon".
    • The show reuses the same footage of the kids buckling up when they're about to go into space over and over, though it gets changed whenever Carrot and/or Mindy come with them.
    • In "Commander Cressida Story Contest", stock footage from the entire "Goldilocks and the Three Bears" segment from a season 1 episode is used to pad out the runtime and to explain how Earth's water is "just right".
  • Straight Man: Mitchell's dad, when paired with Carrot.
    • Sean is usually this when with Jet, Sydney, and Mindy.
  • Sting: In the episode "Diggin' Earth", Sunspot does it by drumming the air (aliens!) then hitting a shot blade as a cymbal. A response to Dr. Rafferty's "groundbreaking project" quip.
  • Suddenly Fluent in Gibberish: Jet is somehow able to communicate with the rovers Beep and Boop perfectly.
  • Sudden Name Change: In "Solar Power Rover", Beep the rover was originally named Shep until Jet found out that she was actually named Beep.
  • Super OCD: Sean definitely has a case of this. Especially in "Eye in the Sky", where he has a chart for every possible situation, except for rain.
  • Surprise Party: The episode "Earthday Birthday" has the group planning a surprise party for Jet for the anniversary that he came to Earth.
  • Suspiciously Specific Denial: Many of these occur throughout the series, usually by Jet, along the lines of "I'm totally not an alien from another planet or something!"
  • Tagalong Kid: Mindy is the youngest of the clique and wants to go into space, but can't because she can't go anywhere past Jet's yard.
  • Tag Line: A Kid's Place is Exploring Space!
  • Tearful Smile: In "Jet Cooks Dinner", the Propulsions begin to miss Bortron 7 and the Classic 3-part Bortronian Meal. After they sing the commercial tune, Jet gets nostalgic about Bortron 7 and starts to cry a little bit, while smiling.
  • Team Chef: Carrot is a great chef, making many odd Bortronian dishes.
  • Telepathy: In "Whole Lotta Shakin'", Jet speculates that Zerk can his read his mind, since Zerk always seems to know what Jet's doing.
    Carrot: What is this, Mind-Reading Day?
  • Tempting Fate: In "Satellite Selfie", Jet says he's not gonna blink when the satellite takes a picture of Boxwood Terrace. He then sneezes, which causes him to blink.
  • Title Drop: Happens quite often. The kids often say "Ready! Jet! Go!" while blasting off.
  • Title Scream: READY! JET! GO!!!!
  • Title Theme Tune: "Jet Propulsion, that's his name!"
  • That Cloud Looks Like...: Happens at the beginning of "Project Pluto".
  • That Reminds Me of a Song: This show loves this trope.
  • Theme Tune Cameo: Several.
    • In "How We Found Your Sun", it is revealed that the Propulsions found Earth by picking up a radio signal that was playing a 1950s rock 'n' roll song called "Jet Propulsion". It sounds just like the show's theme song, and is the protagonist's namesake. However, it has different lyrics. Here are some lines from the song that can be heard during Jet's narration:
    Jet Propulsion, he found our star. Jet Propulsion, we met him hot. I'm on fire, baby give me some room. E=Mc2
    • In the beginning of "Satellite Selfie", Jet hums the show's theme song.
      • Also in that episode, Sean, Jet, and Mindy briefly reminisce of how Jet got to Earth. An instrumental version of the show's theme song plays during it.
  • This Is Gonna Suck: In "A Hammer and a Feather", Carrot tries to drop a chicken egg and an ostrich egg at the same time. Sydney's reaction:
    Sydney: I think I know where this is going...
  • Token Evil Teammate: Mitchell is this ever since he somewhat joined the clique in "Holidays in Boxwood Terrace". He definitely has the most vices of the cast, being aloof, sarcastic, vain, and temperamental. Plus, he's out to expose Jet's identity. However, he is not evil and has many good qualities.
  • Token Minority: Several.
    • Sydney is African-American.
    • Mindy is Latina.
    • Lillian, Mindy's friend, is possibly Asian.
  • Tomboy and Girly Girl:
    • Sydney, who has no interest in feminine things, and Mindy, who loves teddy bears, dolls, the color pink, and teaparties.
    • Mindy is herself the tomboy to Lillian's girly girl, as seen in "The Grandest Canyon". Mindy may be fairly feminine in her own right, but Lillian appears to be even more so, right down to her blatantly feminine outfit when she first appears, in comparison to Mindy's more, um, plain usual outfit.
  • Took a Level in Kindness: Mitchell in "Detective Mindy". Also in Mindy's Mystery, even though he was a jerk towards the group for most of the episode, Mitchell still attended Mindy's concert just for the heck of it (and possibly out of sympathy)
  • Totally Radical: "Hey, daddy-o! What's shaking?"
  • Trademark Favorite Food: The Propulsions love the Classic 3-Part Bortronian Meal, which consists of a Hoagie, a Figinnuz, and an Exploding Shake.
  • Trailers Always Spoil: The commercial for the week of new episodes in August 2016 spoiled Face 9000's new look.
    • Sometimes, this is a case of Episode Descriptions Always Spoil. For example, the description for "Mindy's Meteorite Stand" spoils the fact that Mindy's meteorite really wasn't a meteorite, but the big rock she was sitting on is, "Sunday Drive"'s description spoils that the Propulsions weren't on Mars, but an Earth desert, and the description for "Mindy's Mystery" spoiled that the mystery smell came from moonflowers, and the bright light that was bothering Mitchell was from the moon itself.
    • Zigzagged for the images the wiki provided for Season Two. While some images are tied to the episode's theme, some are just random screenshots. A few ridiculous examples of the latter include: The image for "Zerk Visits Earth" doesn't feature Zerk, the image for "Sunspot's Sunspot" doesn't feature Sunspot, the image for "Sean Has a Cold" depicts Sean as completely healthy, and the image for "Mars Rock For Mom" is a frame from the the takeoff sequence.
  • Training Montage: Parodied in "My Fair Jet", Jet goes through a training montage while training to behave like a regular human child. Complete with rock music playing in the background, until Sean tells him to stop that.
    • A variation occurs throughout "Pet Sounds", with the kids trying to train Cody to do tricks, but with the show's regular quirky music instead of rock music.
  • Tropey, Come Home: In "Sunspot's Night Out", Sunspot goes missing in the neighborhood, and the gang tracks him using the North Star. Mitchell's dog Cody also went missing. Turns out, they were both performing in an animal choir.
    • In "You Can Call Me Albedo", Cody runs away after Mitchell makes him wear a black sweater.
  • True Companions: Even after all the drama they've been through regarding Jet's alien identity, and the occasional disagreements, Jet, Sean, Sydney, Mindy, and Sunspot love each other to death, hang out all the time, and will do literally anything for each other.
  • Tsundere: Mitchell. Type A. He's usually very cruel and snobbish towards the main characters (especially Mindy) in public, but he actually does have a nice sidenote . The Christmas Episode even reveals that his tsun tsun tendencies are all a facade.
  • Twitchy Eye: As part of his Sanity Slippage, Carrot gets one at one point in "Castaway Carrot".
  • Two Guys and a Girl: Jet, Sean, and Sydney.
  • Two of Your Earth Minutes: The Propulsions tend to talk like this.
  • Two Shorts: There are usually two 11 minute shorts, with a minute and a half long Amy Mainzer segment in between.
  • Two-Timer Date: A non-romantic example. In the episode "Jet 2", Jet wants to watch Commander Cressida with Sydney, but also promises to help Sean with something at the same time. Jet tries to remedy the situation by making a robot clone of himself called Jet 2 and having it watch Commander Cressida with Sydney while he helps Sean, but when Sean and Sydney start hanging out with the robot instead of the real Jet, he gets jealous.
  • ¡Three Amigos!: Jet, Sydney, and Sean.
  • Treehouse of Fun: In "Treehouse Observatory", the kids build their own treehouse which serves as a hangout for the clique and an observatory.
  • Unknown Rival: Jet, for the most part, is unaware of Mitchell spying on him. The only kid who knows about it is Mindy.
    • However, in "Back to Bortron 7", it is implied that the other kids know that Mitchell spies on them.
  • The Unpronounceable: All three members of the Propulsion family have weird strings of sound effects for their Bortronian names.
  • Unwanted Assistance: Happens many times, usually with Mitchell trying to solve a case. If another character offers to help, Mitchell will usually turn them down, claiming that he works alone. Usually, this is out of shyness or overconfidence.
  • UST: Mindy and Mitchell have strong shades of this. It's clear that they like each other, (even if it isn't confirmed in series or by the creator), but sadly they can't act on their feelings yet because they're little kids, and they're in a PBS educational cartoon.
  • Valentine's Day Episode: "From Pluto with Love" is this, making it the 3rd holiday episode. The kids get ready for Valentines Day by making their own valentines out of paper, and Mindy feels sad that little, frozen Pluto is so far out at the edge of the solar system. So, the older kids go up in space and visit Pluto, while Mindy watches on Jet's smartwatch, and the cast sings "Dear Little Frozen Pluto".
  • Vague Age: While it is known that Mindy is 4 years old, it is unknown how old the other kids are. It is likely they are in their mid-to-late preteens, but it is unclear. Sean knows what payload is, but somehow does not know what asteroids are. Meanwhile, due to the inconsistency with the animation, Mitchell is either taller or the same size as Mindy, and does not know how to spell "electric engine" yet can make a replica of Saturn V and somehow managed to acquire an ion drive.
    • Zerk, who is presumably no older than Jet (in Earth years at least), is allowed to drive flying saucers as revealed in Back to Bortron 7. And he's been doing this since he was fifty. However, Bortron 7 may have different driving laws.
  • Verbal Tic: Jet's cousin Zerk has a tic where he says a word multiple times. For example: "Bye bye bye bye bye!"
  • Vine Swing: Carrot briefly does this in "Mindy in Space". He even imitates the Tarzan yell!
  • The Voice: Several characters have been heard, but not shown, such as Mitchell's mom.
  • Vocal Evolution: In season 2, Sean's voice gets deeper and raspier, likely due to puberty.
  • Waxing Lyrical: In "Jet Can't Sleep", the characters are playing charades. Sunspot acts out a thunderstorm by dancing around with a flashlight and drum. Jet guesses "I got rhythm, I got music".
  • Weirdness Censor: Nobody in Boxwood Terrace (save for Mitchell), acknowledges the alien behaviors of the Propulsions, or notice their minivan turning into a flying saucer.
  • We Need a Distraction: In Mindy's Mystery, the kids try to infiltrate Mitchell's backyard in order to find the source of the mystery smell. In order to distract Mitchell, Jet and Sunspot stop him in his tracks and perform circus tricks while Sean, Sydney, and Mindy search Mitchell's area.
    • In "Ice Moon Enceladus", the kids run out of ice for their sno-cone stand, so they decide to fly to Enceladus to get more. However, the Propulsions need to keep secret that they are aliens, so in order to distract the angry customers, Mindy sings a cute little song of hers while hula-hooping to distract them.
  • We Were Rehearsing a Play: In "My Fair Jet", Jet sings a song about how he is Bortronian. Then, Mr. Peterson comes over, and asks "Bortronian is what you what?!?" Sean and Sydney, desperate to keep Jet's alien identity a secret, claim that he was rehearsing for a play he wrote.
  • Wham Episode: Several episodes. So much that they now have their own page.
  • Wham Line: "That looks like fun. I can only imagine." and "Thanks for including me. I really wanted to be a part of the show, but I didn't know how to ask, both from the Christmas episode.
  • What Could Possibly Go Wrong?: Jet says this in "Back to Bortron 7", after Sean says that he hopes that he doesn't regret going to Bortron 7. Tons of things go wrong. The group finds out that after Carrot and Celery do their presentation, they will be done with Earth, and they will be assigned to another planet. They can't go back to Earth, meaning that Sean and Sydney will never go back to Earth. Also, Mitchell almost exposes Jet's alien identity to the public.
    • Sean says this in "Holidays in Boxwood Terrace" after Mindy asks him if the pressure for him to sing the pageant finale song will be too much. When its time to sing it, Sean gets Performance Anxiety and freezes up in front of everyone. Mitchell takes over for him.
  • Whatever Happened to the Mouse?: In "Beep and Boop's Game", the DSA scientists want to know if a mountain on Mars is really a volcano. By the end of the episode, we never do find out if it was a volcano or not.
  • What the Hell, Hero?: The other kids are this to Jet whenever he does something really dumb.
  • Wise Beyond Their Years: The kids all seem to be this, especially Mitchell, who is little but can build an exact copy of Saturn V.
  • Women Are Wiser: This show loves this trope. See Positive Discrimination above for more.
  • Worst Whatever, Ever!: In "Chore Day", Jet calls his chore of testing out the hover scooters the "Worst. Chore. Ever."
  • You, Get Me Coffee: In "Commander Mom", there's a Running Gag that involves Jet ordering Sunspot to get him a glass of water, instead of actually helping him with his project.
  • You Remind Me of X: In "The Grandest Canyon", Sean remarks that Mindy reminds him of a young him, but Sydney tells Sean that "you are still young you."
  • Youthful Freckles: Sean, Mitchell, Dr. Rafferty, Eggplant, and Zerk all have these.
  • Zany Scheme: Jet is full of them.

Tiny blue dot, what a gorgeous little spot. Our planet, our spaceship, our home.

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