Candace believes no one likes her, so she uses the portal from "[[Recap/PhineasAndFerbUnfairScienceFair Unfair Science Fair]]" to go to Mars, and Phineas and Ferb try to bring her back after the portal gets broken.

Meanwhile, Dr. Doofenshmirtz shops for supplies and enlists Perry the Platypus to help him.

This episode takes place at the same time as the [[Recap/PhineasAndFerbUnfairScienceFair previous one]].
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!!Tropes
* AlternateLandmarkHistory: Doofenshmirtz accidentally turns on his very first Inator and fires it into Mars, destroying a huge carving of Candace's face on the rock done by the Martians, and turning it into the infamous [[https://en.wikipedia.org/wiki/Cydonia_(Mars)#%22Face_on_Mars%22 "Face on Mars"]].
* AnAesop: When the Martians want to spend every waking moment with Candace, she points out, "Just because I need to do things without you, sometimes, doesn't mean I don't like you or don't appreciate your friendship."
-->'''Phineas''': But, Candace, isn't that—
-->'''Candace''': Yeah, yeah, just like my friends with me. Whoop-dee-doo.
* BatmanCanBreatheInSpace: In real life, Mars does not have a breathable atmosphere for humans, but Phineas, Ferb, and Candace don't have a problem breathing.
* BeCarefulWhatYouWishFor: Candace wishes her friends had time for her, but when she becomes Queen of Mars she quickly gets tired of the Martians constantly showering her with attention.
* BrickJoke: In TheStinger, Doofenshmirtz gets transported to Mars and is surrounded by Martians. They walk up to him as if they are going to make him King of their planet, but they end up giving the crown to a baking soda volcano.
-->'''Doofenshmirtz:''' Oh, come on!
* CallBack:
** When Candace is calling everyone she knows, among the people she contacts are the head lice, Olga and Chicago Joe, who served as her personal trainers in "Lights, Candace, Action."
** She also mentions her friend Jenny, and lampshades how she hasn't been seen since the [[Recap/PhineasAndFerbLawnGnomeBeachPartyOfTerror beach party episode]].
** She mentions a girl named Wendy, who may be the girl she competes against later on, though she may be a different Wendy.
* CharacterCatchphrase: This marks the first time that Candace says, "Candace Flynn is out! PEACE!" while flashing a peace sign. It is also said by an unknown guy who was avoiding her at the end. ("Unknown Guy is out! PEACE!")
* DescriptionCut:
-->'''Phineas''': (Referring to the portal to Mars) Don't worry, we can fix it! Heh, Candace is probably laughing about it as we speak!\\
(Cut to Candace on Mars)\\
'''Candace''': PHINEAS!!!
* EverythingIsAnInstrument: The Martians play the music for "Queen of Mars" on their own bodies, using their antennae as string instruments and their teeth as keyboards.
* FunnyBackgroundEvent: While the scientist has a meltdown over his boredom with nothing on Mars, Candace tries to get his attention by screaming and yelling, waving flags in semaphore, and juggling rocks.
* GaveUpTooSoon: The scientist monitoring the Mars rover gives up and shuts down the search for extraterrestrial life just as Candace tries (and fails) to get his attention.
* {{Montages}}: Candace calls many people that she wants to hang out with, including Olga and Chicago Joe. At the end, she is so desperate, she even wants the phone operator to hang out with her.
* PoorCommunicationKills: Stacy sends Candace a text reading: "CYL BFF S". Candace interprets it as "Candace, you loser. Bad friendships fail. Stacy." It turns out that Stacy was trying to say "Call you later. Best friends forever. Stacy."
* SdrawkcabSpeech: The aliens' gibberish consists of backwards names such as "[[WesternAnimation/{{Fantasia}} Yensid]]" for "Creator/{{Disney}}" and "Erimnevop" for "Povenmire". When Ferb speaks their language, it is merely his only line backmasked.
* ShoutOut: Linda's comments about the face on Mars looking like a "rhesus monkey wearing a powdered wig" may very well be a reference to a joke from ''WesternAnimation/RockosModernLife'' in which Filburt calls Heffer a "wig-wearing rhesus monkey". Both episodes were written by Martin Olson.
* SkewedPriorities: Baljeet is more concerned about getting a good grade at the science fair than with saving Candace.
* StableTimeLoop: Phineas, Ferb, and Baljeet fix the portal to Mars when they tune the portal to a vision of themselves a few minutes in the future, showing their past selves how to fix it.
-->'''Future!Baljeet''': Gesundheit!
-->'''Baljeet''': Thanks. Achoo!
* SuperCellReception: Phineas and Ferb are somehow able to get cell reception on Mars; Candace even lampshades this.
* SynchronousEpisodes: With [[Recap/PhineasAndFerbUnfairScienceFair Unfair Science Fair]].
* VillainsOutShopping: Rather literal this time; Doofenshmirtz is still in the early stages of his evil scheme, and takes Perry shopping with him. At one point, they awkwardly bump into Monogram and Carl.
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