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    General 
  • The friendship between the three boys are just this. They may have fights or disagreements, but no matter what, they always are friends that will risk their neck to save each other no matter what.
    • There is something incredibly admirable about how devoted Pete is to his friends. He is the most timid and cautious of the three, frequently complaining about how much danger they're in / how much danger Jupe wants to put him in during assignments, causing the most friction in the group. But despite all his complaining, he will still do what is asked of him because he is just so dang loyal. In fact, in the face of real danger, contrary to what he says, Pete is usually in the front facing the danger head-on and will do his best to protect his friends. While the Investigators always rescue another, Pete has racked up the most points on death-defying saves. His loyalty is so prominent that if forced to pick between Pete and Bob in a hypothetical life or death situation, Jupiter would ultimately choose Pete just to pay back how many times Pete has saved him.
    Bob: (nudging Jupiter) Don't brag, you master detective. Pete's saved your neck enough times when you really gotten yourself into trouble with your brilliant ideas.
    • Their friendships are so strong that their friendship bleeds over to their parents / guardians. The parents frequently feed and house the other kids whenever they are over because they are over just that often. They treat the other boys as if they were their kids as well. Also despite the fact that the parents don't seem to like their kids hanging out with each other (because they always get into trouble when they do), they never actually try to separate them.
  • Adults tend to have a relatively neutral or negative opinion of three kids / teenagers solving mysteries, but young kids always are awestruck by the Investigators. They will excitedly stare and are very eager to listen. It seems as though the local youngsters in Rocky Beach consider them heroes.
  • Throughout the series, the relationship the boys develop with Worthington is made of heartwarming, to the point he considers himself the fourth investigator and always trusts them, giving them the benefit of the doubt in all situations no matter what they were accused of.

Original Release

  • Hans and Konrad act like the boys' big Bavarian brothers. They may be their employer's kid and friends, but they will just as fiercely defend them if they are in trouble. Hans and Konrad are also one of the few adults who are totally okay with doing what Jupiter says.
  • The friendship between the boys and Alfred Hitchcock. At the start he's nothing but dismissive or antagonistic to them, and they in fact have to bargain to even get him to introduce their cases at all. But as time goes on he starts sending them cases or recommending prospective clients to them without even asking, genuinely praises their work, and is alternately amused, heartwarmed, or enthusiastic about various denouements to their cases. He outright apologizes in one of his introductions for his initial ill judgment of them (especially Jupiter, even as he admits he can still be irritating), and it becomes very clear that he has become very fond of them and enjoys their association as well. It makes his eventual death even more heartbreaking—and as much as Hector Sebastian clearly likes and admires the boys, and vice versa, something seemed to very much be lost after Hitchcock was gone from the series, perhaps explaining why it eventually petered out in the U.S.

    Book # 1 - 23 

#2 The Mystery of the Stuttering Parrot

  • Uncle Titus disarms Aunt Mathilda's anger over the giant iron statue of a buck that he brought to the yard by saying he intends to put the statue next to the house rather than sell it... as he puts his arm around her and says, "Now I have two dears."
  • Aunt Mathilda and Uncle Titus calculating and re-calculating the costs for Carlos's reward so that he can get extra money back. The second is particularly notable since it takes place after Carlos is forced to give the extra money to the woman his uncle sold Blackbeard to... so he pretends Aunt Mathilda made a mistake and gives him the same amount he lost.
  • After this story, the Investigators had adopted Blackbeard the "Starling", keeping him in Headquarters. He can be subsequently seen and mentioned in further books.

#14 The Mystery of the Coughing Dragon

  • The fact Shelby can't bring himself to harm the dogs his whistle keeps summoning. And Jupiter calls him on it, revealing he isn't the criminal he pretends to be.

#16 The Mystery of the Nervous Lion

  • Why does Jim Hall get rid of George's cage? Not just because he didn't want Eastland or his actors and crew to think the lion was dangerous, but because he wanted George to feel like a member of the family and felt awful locking him up, away and separate. Also, the scene where he and Jim wrestle and play together, ending with the lion purring.

#19 The Mystery of Phantom Lake

  • Rory not wanting Angus Gunn's treasure to be found... because he wants to marry Mrs. Gunn, and is afraid she won't accept his proposal if she's rich (because he's just a poor Scotsman). When Hitchcock asks what the lady said about the matter, Bob says with a grin that she's thinking about it.

    Book # 23 - 43 

#31 The Mystery of the Scar-Faced Beggar

  • The real Alfred Hitchcock passed sometime after Shark Reef and his in-story persona ended up passing away as well. The boys are understandably heartbroken over his death, having considered him a real friend and mentor.
    • However, by the end of the story, they become good friends with Hector Sebastian, who is all too happy to try to fill in the shoes of Hitchcock before him, being their new mentor to introduce and conclude their stories.

#35 The Mystery of the Kidnapped Whale

  • Bob frequently describes Fluke as 'smiling' when the whale greets him.
  • Apparently, Fluke was so smitten with Constance Carmel that he refused to leave the bay even though he had been formally released. In the end, Constance ended up having Fluke placed at the ocean park she worked at so she can be together with him full time.

#37 The Mystery of the Two-Toed Pigeon

  • Pete becomes attached to the pigeon that had been swapped for the two-toed one, naming it Caesar and being the main one to care for it. Throughout the story, he is seen petting the bird and is delighted when Caesar returns to the scrapyard because it considered the place its new home.
  • Jupiter has Pete pose as a bird activist selling balloons to provide a distraction so he can swap Caesar's and Kyoto's pigeon, which ends up being an incredibly stressful and terrifying experience. He feels absolutely terrible about making him do this and tries to cheer Pete up by letting him be the one to release Kyoto's pigeon.

#39 The Mystery of the Trail of Terror

  • Although Bennington Peck doesn't seem to have a good relationship with his daughter (Mrs. Crenshaw) and his son-in-law (Mr. Crenshaw), he seems to adore Pete and his friends. He is all too excited to take them with him on a cross-country trip. He is also notably much gentler with his grandson despite Pete being just as much a worrier as his parents are.
  • The moment Bob asks his parents to go on a trip with Pete, Jupe, and his Pete's grandma, they immediately agreed to let him go from the sole fact that Jupiter was going along. They trusted him that much.
  • During the trip, his grandpa acted so nutty that Pete was scared his friends would be driven off and go home, leaving him to watch over his grandfather himself. But Jupiter and Bob stick with him all the way, despite the strange happenings on the trail.

#40 The Mystery of the Rogues' Reunion

  • It's implied from Jupe's inner thoughts that the Three Investigators regularly go to the beach and go surfing in the morning together which is just adorable.
  • Pete and Bob join the audience during the quiz show to support their friend. When Jupe looks at them in the stands, Pete makes a self-clasping handshake over his head, a symbol of victory in boxing, to congratulate/cheer Jupe on winning the first round and/or that he felt that Jupe's victory is already assured.
  • Both Peggy and Gordon Harker's relationships with Jupiter as adults, particularly Peggy noting at the end that after all the times she had to rescue Baby Fatso in the TV show, now it was finally his turn to rescue her.
  • In the end, Jupe decides to lose on purpose so Peggy can get the money so she can attend college. At the end of the story, Pete reveals that she was going to start her first semester at Berkley soon.
    • In fact, all of the Rogues have a more or less happy ending: Footsie has finally found a stable job, Gordon Harker returns to his job as a teacher with his secret intact, Bloodhound is going to become a lawyer to help young actors and actresses fight for rights and not get exploited. Though Bonehead still has to work as a car mechanic, he hasn't been charged and is still able to pursue being an actor. Even Luther Lomax has been admitted to a home for retired movie people, getting the mental help he needs.
  • Despite hating his past as Baby Fatso, Jupiter still signs an autograph for Don as his former persona.

#42 The Mystery of Wrecker's Rock

  • After reviewing their case, Hector Sebastian and the Investigators have a lunch of French cuisine that Don had prepared earlier as he was going to appear on TV alongside a famous chef. As the four are watching the show, the chef is impressed with Don's skills and claims he would be 'serving banquets to the famous'. Don replies that he already serves the famous mystery writer, Mr. Hector Sebastian, but also The Three Investigators, much to the shock and happiness of the three boys.
    Don: Ve-rry famous detectives! Jupiter Jones, Bob Andrews, and Peter Crenshaw. I proud to cook for them [sic].

Crimebusters

    Book # 1 - 11 

#1 Hot Wheels

  • Jupiter being a little insecure about his weight and Bob has this to say:
    Bob: Hey, I don't care if you're fat-
    Jupe: I am not fat! A little... heavy, maybe, but-
    Bob: Jupe, it's okay. Pete and I like you, heavy or skinny.
  • The fact that Aunt Mathilda is willing to post bail on Ty, a relative she has never met before from a cousin she disliked. She even gets her lawyer to fight his case. Just another thing to prove how big a heart she has.

#3 Rough Stuff]

  • After facing their own harrowing events (a landslide for Bob and getting lost in the woods for Pete), when the two reunite, Pete straight up glomps Bob in relief and even carries him back to camp.
  • Out of the blue, Jupe recalls the fact that Bob was wearing contact lenses and asks if he'll be alright.

#9 Foul Play

  • When Pete starts getting intimidated by all the other auditions, Jupe gives him this uplifting pep talk:
    Jupiter: In the last day, with my guidance you've learned more about movement and dance than most people learn in years. You don't stink, Pete. You're an athlete who's highly trained in martial arts, and your movements have natural grace. That's more than half the battle. If they see that, they'll know they can train you the rest of the way. You have one simple job today. Just show them you can conquer the world.
    • The great part, is that Pete does end up getting the role even though he initially thought he blew it. So did Jupe (though he got the very comical 'beach ball' role).

German Extended Release

  • It's really heartwarming how much Inspector Cotta cares for and trusts the trio. He pretends to act really annoyed when they call, but Jupiter claims that he is having fun playing that role with them and his way of teasing. Even though he's really not supposed to, he still helps them on their investigations by searching up information for them and analyzing things in the forensics lab. He will always jump to their rescue if they need it. They are such good friends that Cotta is inclined to believe them even if the odds are stacked against them.
    • He affectionately calls Jupiter, 'Sherlock Holmes'.
Books
    Book # 56 - 71 (Henkel-Waidhofer Era) 

#59 Dopingmixer

  • Jupiter appears to the track to both support and keep a record for Pete. Apparently he's been keeping record for the last two years.
    • As he's watching Pete train, Jupe admits to himself that there are probably people faster than Pete, but that his friend had the most 'beautiful style' and that if there had been a competition for it, he would win.

#67 Der Schatz im Bergsee (The Treasure of the Mountain Lake)

  • When they don't find Pete at first, Bob grows more and more depressed and despondent. Jupe ends up giving him a hug and tries his best to be positive for the both of them.
  • To help him recover, Jupe engages Pete in a nostalgic conversation to keep him awake so he slowly work through the shock. They end up talking about their home, families, friends, girlfriends, and even their pediatrician. They end up joking about and even start laughing, and in no time at all, Pete gets well enough stand up and walk (with some help).
  • The fact that the boys risk tooth and nail to save Jerzy the pilot, even though they barely knew him. He was only a tour guide for them, but saved his life and took care of him.

#68 Späte Rache (Late Revenge)

  • Jupe deciding to lie to Mrs. Crenshaw, Pete's mom, even though he had a gut feeling that something was wrong. He just wanted to keep her from worrying as long as possible before it really was confirmed that something really did happen to her son.
  • The fact that the other adults seem just as worried about Pete as Pete's parents are. Mr. Andrews (Bob's father) wants to keep posted and both Aunt Mathilda and Uncle Titus express their comfort and worry over Jupe's missing friend.
  • Pete's reaction to seeing the thunderstorm right after his escape. It's a little heartbreaking, as it was his first time seeing the outside after spending more than forty hours trapped in a dark, empty room, but he is relieved to feel the rain and see the flashing thunder. It's his realization that he's really escaped.
  • As harrowing as the whole ordeal was, Pete didn't come out of it empty-handed. He befriended and adopted an Irish Wolfhound (which likely had been abandoned by his captor), who became his travelling buddy when he made the treacherous march back to civilization. Pete and Shadow bonded very quickly, the dog responding to Pete's whistle and was likely the one who kept watch over Pete while he slept at night. Pete even shares his food with Shadow despite having not eaten very well for half a week by that point.
    • When Pete lets out a cheerful yell as he begins his trek back home, Shadow barks with him excitedly as if to cheer him on. Moments before, the dog literally tackles Pete and the two just have fun and wrestle in the grass and mud.
    • In the end, Pete can't keep the dog, but Shadow the dog now stays at the scrapyard with Jupe, where Pete can visit him any time.
  • The fact that Pete's daydream became true and his story got told in the paper, letting many others know of his harrowing experience and his courageous escape afterwards. Mrs. Crenshaw is noted to be particularly proud of her son.
  • In the radio play, everyone's reaction upon hearing Peter's voice on the phone, a cheerful: "I lived, boss!". Just laughter and cheers all around.

#071 Der dreckiger Deal (The Dirty Deal)

  • Apparently the reason why Shadow had been sent to Peter's aunt because he kept running away from the scrapyard to Peter's house where he kept heartrendingly barking for Peter.
  • It seems like Peter is not the only one who likes Shadown Uncle Titus seems to really like Shadow too.
    • Kelly, who had seemed jealous of Shadow at the end of Späte Rache, is now completely fond of Shadow and so is he. They jump up and hug each other upon meeting.
    • Jupiter correcting himself from 'three of them' to 'four of them' to include Shadow.
    • Shadow taking the passagener seat in Pete's car to sit next to his favorite person and Bob let him take it.
  • Malcolm King is honestly a great guy. He' a political activist and was fighting for rights for his people. That's the reason why he had gotten kicked out years prior. He decides to help Lauren from the drug smugglers because his friend, Hoover, had been such agaisnt it.
    • On top of that, King always loved to help students out who come to his little store. Whether it is helping them with their homework, hearing out their personal problems, or even putting a good word for them.

    Book # 72 - 119 (Triumvirate Era) 

#77 Das leere Grab (The Empty Tomb)

  • Unable to take just sitting around, both Bob and Pete decide to go to Venezuela after Jupe. Bob would have to use his vacation savings with Elizabeth and Pete would have to sell his new bike, but to them it was worth it. It's clear how much these two really love their friend.
    Bob: I saved some of the money I made at Sax Sendler to go on vacation with Elizabeth. I just have to postpone that.
    Peter: And I can sell my new bike again. I didn't need it that badly.
  • Bob, Pete, Aunt Mathilda, and Uncle Titus all deciding to go after Jupiter in another country. Jupe's parents may be still dead, but he still has a family: a loving Aunt and Uncle and two best friends and True Companions who would always have his back.

#80 Geheimsache UFO (Classified: UFO)

  • Jupiter and Pete end up having a pretty vicious fight and Jupe does end up saying some really harsh things to Pete's valid concerns, causing the latter to storm out. Bob is incredulous about Pete showing up to the orchard to talk to Mr. Carpenter, but Jupiter is certain that he would show up. For a while, it does seem like he isn't going to show up, but he did, Jupe was right. He had arrived late on his bike and had watched their confrontation with the Man in Black and later sneaked into the barn to free them. Goes to show that despite how slighted he feels, Pete will always come through for his friends.
  • At the end, Jupiter apologizing to Pete, realizing that he had been unfair to him:
    Jupiter: Speaking of which, I guess it's time for an apology. (to Pete) I haven't been entirely fair to you. I have been passing you over when it came to making a decision. Forgive me?
    Pete: (smiling) Obviously.

#84 Feuerturm (Fire Tower)

  • Despite having the money to do so, both Bob and Pete deciding to stay in Rocky Beach because Jupiter doesn't have enough money at the moment to go to Scotland.
    • Even more so, Pete's dad offered to loan Jupe the money to go, but both Jupe and his uncle refused.
  • In the beginning of the story, Pete seems to be suffering from a stomach bug because he stayed up late with Kelly. When he struggles to stay awake, Jupe just tells him to rest.
  • As mentioned before, young kids tend to look up to the Three Investigators, Chris is no exception. He also declares that everyone knows them by that point and that they're famous, much to the embarrassment of the boys. Bob also allows him to stick around for the letter reading even though Jupe was reluctant to.
  • Monica's friendship with Glenn. He tried to make sure that she was the only one who got his manuscript in the end because they both shared a dream of expanding the park. Now, with the Three Investigator's help, she can finally fulfill her dream.
  • The Three Investigators offering their services to Monica to help her catch the Bear Hunters.

#87 Tödliche Spur (Deadly Trail)

  • When it appears that Worthington was dead, all three boys are really torn up over it. They are really good friends. The next day, all three of them decide to go to the headquarters because they couldn't stand being alone and needed each other's support.
  • Pete wanted nothing to do with investigating into the possibility that Worthington's apparent death, finding it disrespectful, but when both Jupe and Bob wanted to look into it, he came along anyway because he couldn't let them go at it alone.
  • Worthington trusted the Three Investigators so much that he entrusted them to be able to follow his trail and help him with his personal secret. On the other hand, Jupiter and Bob both immediately detect something suspicious and wanted to do all they can to uncover the truth. Pete needed a bit of convincing (because he was trying to be respectful to Worthington), but wholeheartedly did all he could to help.
    • It was already clear that Worthington really trusted the boys, but its to the point where he actually made Jupiter his power of attorney. It isn't clear if Worthington revoked it by the end, so it's very possible that Worthington had kept Jupiter's right.
    • When the idea that Worthington might have been part of the crime and might be a criminal, Pete adamantly refuses the idea that their friend could be guilty and seems like he won't even turn him in if he was.
  • At the end of the story, Jupe, Pete, and Bob come to the realization that despite having been friends with Worthington for years, they never really treated him like anything other than their driver. So for the first time, they invite him into the headquarters to just hang out as friends. And he does.

#91 Labyrinth der Götter (Labyrinth of the Gods)

  • Aunt Mathilda goes all Mama Bear the moment Peter walks into the junkyard covered in some pretty ugly scrapes after a cycling accident. She immediately asks him if he would like to go to the hospital, and when he refuses, she sits him down with a washcloth, a bowl of water, and a first aid kit to treat and dress all his wounds. She wouldn't take no for an answer, even when Peter tried to refuse her help.

#92 Der rote Rächer (The Red Avenger)

  • Although they were joking, Peter and Bob were both genuinely worried when Jupiter started indulging in snacks. They know how hard he worked to get to a healthier weight and they just don't want him to fall on old habits.
  • Aunt Mathilda telling Jupiter of how she met Uncle Titus. Turns out they went to the same school and while they weren't sweethearts at first, they eventually fell in love. Aww.
  • The fact that Aunt Mathilda asked Jupiter if it was okay for she and Titus to go away for the weekend. Mathilda is the adult in that situation, she could have just left, but it's clear how much she respects her nephew.
    • Although she and Titus weren't there to verify if Jupe started the fire in the beginning of the story, they still believe he didn't.

#96: Rufmord (Slander)

  • At first, Jupe didn't want to go on the radio show because he didn't want anyone to connect him with his old persona of 'Baby Fatso', but he ended up agreeing because Pete and Bob really wanted to.
  • The first caller on the radio show is Agatha Agawam, their client from The Vanishing Treasure, all the way back in the original series. She called to give them support and to thank them again for everything they've done to her and tells them to visit her again so she can make them some pie.
    Agatha: [...] I will be grateful to the Three Investigators for the rest of my life.
  • When it was clear that Jupe was getting irritated by the a young caller that question their ability solve cases, Bob and Pete speak up in support of their First Investigator:
    Bob: As much as I would like to give you an answer to your legitimate question, I can't explain it either. Sometimes the clues fall into our hands, and other times its just a great deal of luck.
    Pete: But we owe most of it to Jupiter's intelligence. With his help we often managed to lead the wrongdoer into a trap where he was later caught.

#97 Tal des Schreckens (Valley of Terror)

  • Jupiter saving a mouse being tormented by a cat at the beginning of the story.

#98 Dopplete Täuschung (Double Deception)

  • Even though he disliked the idea of returning to Abraham's supposed apartment, Peter still showed up anyway.
  • To escape the cops, Peter decides they need to jump to the next building, a two meter jump. Jupiter, who is normally very confident, is actually scared of making the jump. In the same way Jupiter courageously removed the police tape earlier despite his team's reservations, Pete encourages Jupe to have that same courage to jump, having full faith that he'll make it. To give his friends courage Peter easily makes the jump, Bob following. Bolstered by his friend's encouragement, Jupiter manages to clear the two meter jump.
    Peter: (clapping) Bravo, Jupe! Didn't I say so?

#99 Das Haxenhandt (The Witch Phone)

  • At the beginning of the story, the tires to Pete's bike have been slashed. Bob, whose bike was spared, decides to stick with Pete anyway, even though he could just ride away on his bike.
  • Pete furiously standing up for Jeremy to Hannah after hearing her yell at her younger brother for "making up" the story about the witch kidnapping him.

#100 Toteninsel (Dead Island)

  • The fact that both Jupiter and Bob decided to take the mysterious woman's offer to fly to an unknown country and travel to an unknown island to find their friend, going to do whatever it takes to bring their missing friend back home.
  • Pete reuniting with Jupiter and Bob after over a week of one of the most terrifying experience in his life. After getting over his initial shock of seeing them, he runs over to them and just hugs them.
    Jupiter: (coming out of the shadows) Don't panic, Peter.
    Peter: (shocked) Jupiter!
    Bob: Nice to see you again, Second.
    Peter: Bob! What-what-what-what...
    Bob: Spit it out, colleague.
    Peter: What are you doing here?
    Jupiter: Saving you.
    Peter ran towards his friends and fell into their arms.
  • Jupiter deciding to orchestrate a scenario so Professor Phoenix and all the other members of the expedition were able to escape and avoid being arrested. He knows it's the wrong thing to do, but after all they experienced on the island, Jupiter just couldn't turn them in.

#103 Der Nebelberg (The Misty Mountain)

  • Despite being the most terrified of the misty Phantom, Peter decides that he just can't let Jupiter go up to investigate the mountain on his own and volunteers to go with him.
    Peter: I'll come with you, Jupiter.
    Everyone stared at him in surprise.
    Peter: Save your comments. I know what I said and I still stand by it. This whole plan is one kamikaze operation. But that's why you need me, Jupe. You're lost up there alone. You don't even know where North is.
    Jupiter nodded and smiled gratefully. Nothing more was needed. He knew exactly how difficult the decision had been for Peter.

#104 Der Mann ohne Kopf (The Headless Man)

  • Jupiter and Bob being genuinely worried and angry that Peter was taking drugs after Jupiter saw Amy Scream slip Peter a mysterious pill. While Pete did put it in his mouth, he spit it out a moment later, which something Jupiter didn't see. When he clarifies and even produces the pill as proof, both friends are incredibly relieved and proud of of him.
    • In the radio play, they sound especially proud:
    Bob: Yeah, that's a real reason to be proud of yourself. Who knows what nasty chemicals are mixed in there.
    Jupiter: Congratulations as well. I hope you can forgive me, I was worried!
    Peter: Stop it, First, or I'll start crying. To be honest, I'm glad that our case had a damn good ending.

#109 Die Höhle des Grauens (The Cave of Horrors)

  • After exploring the hotel, Bob returned to see that Pete was still hanging uncomfortably off the armchair after getting knocked out by the sleeping pills. Somehow, he manages to pull Pete onto the bed (which is not an easy feat) and falls asleep next to him.

#110 Das Auges des Drachen (The Dragon's Eye)

  • The whole start of the story is both funny and pretty heartwarming. We get to see the three boys just mess around being best friends and getting into a mudfight. No matter how much they might quibble, this is their true relationship and itw clear they like hanging out with each other very much.
  • Pete and six-year-old Emily's relationship. She seems to really like Pete and eagerly holds his hand. When they being her home, she wants to show Pete her room. He's a little awkward, but does his best to be kind to the little girl. She then gives him a picture of an invisible unicorn and eagerly asks him if he would come by tomorrow. Awww.
    Bob: (cheerfully) Well, here's an unsual client. And she picked a favorite question mark right away. Isn't that right, Peter?
    • Peter is way more amiable to Emily in the radio play and doesn't seem as annoyed as he is in the novel. He plays a long with Emily's imagination and is generally much more gentle.
    • Peter activating his hidden Big Brother Instinct when he hears what the kidnapper did to Emily. He is furious on her behalf and does his best to comfort her.
    The Second Detective felt a hot anger rising inside him. Whoever the perpetrator had been, he wanted to get back at that pig!
    • As they are looking the treasure, Emily gives Peter a bunch of 'magic' flowers. He can't see the difference of course, because she's a tetrachromat and he's not, but accepts it anyway.
    • When they confront Marcus Lake, Peter stands his ground to protect Emily even though a gun was pointed at him. Emily herself takes cover by hiding behind him. Later, all three put themselves in front of Emily when Lake threatens to shoot her.
    • On a trivia note, André Marx had always wanted to give Pete a little sister just like Emily, but the timelines wouldn't match up. He may never get one, but seeing how he treats Emily, it's very clear that he would have made a great older brother.
  • In a much, much later parallel, Peter is notably curious about how Emily can see colors he can't see and wonders about seeing the world in a different way. However in Phonophobia, it's revealed that he does see the world differently: he's a Synesthete and sees letters, words, and numbers as colors, he just had no idea.

#114 The finstere Rivale (The Sinister Rival)

  • In the radio play, Peter gives Jupiter a kiss when he finds out that he had hid the money and it wasn't actually stolen.
  • When Jupiter gets sucker punched by Skinny, Peter just snaps and seems like he was ready to pay back what he did to his best friend tenfold. Jupiter has to yell at him to get him to stop. No one hurts his buddies.
    • Blink and you'll miss it, but Bob is the one who catches Jupiter when he falls back.

#116 Auf tödlichem Kurs (On a Deadly Course)

  • A mysterious man tries to purchase the painting of the ship from Reynolds and he refuses to sell it because it was the trio's gift to him when he retired. And receiving that gift from them meant more to him than all the fancy speeches. No matter how much money was offered him, that painting was priceless to him.
    Reynolds: At the time, I was happier about your gift than about all the speeches and official gifts from the police.
  • The Investigators visit ol' Chief Reynolds who had since retired to eat some ice cream together as friends. He also specially made them ice cream to their colors (white for Jupe, blue for Pete, and red for Bob).

#119 Der geheime Schlüssel (The Secret Key)

  • The Reveal that the Kopperschmidt masterpiece was just a contraption created by Felix that held a precious photograph of him and his children. His masterpiece was his children and he made the whole mystery just so they can reconcile their relationship. The dark things threatening to take his masterpiece away? It was greed, envy, and jealously. In the end, the siblings reconciled and reunited with their father.
    • The fact is that everyone was in on it, their father, Martha Lynn (Craig's wife), and Ms. Loughlin. All they wanted was the siblings to get along again. The Three Investigators even helped out once Jupiter realized that the puzzle really was not meant for anyone else but the siblings.
  • The conclusion ends with Jupiter confessing that he really should have told his friends what happened to Lys because the last thing he wanted was to lose their friendship due to a lack of communication, especially since Pete had snooped a bit and had become worried since Jupe didn't tell them anything. The three then talked until the sun went down, and although we don't know the details of why Jupiter and Lys broke up, it seems like they had a great chat.

    Book # 120 - 200 (Modern Era) 

#120 Spur ins Nicht (Evil Games)

  • Both Jupiter and Pete getting really excited when they first communicate with each other by knocking on the pipes. After they meet up, they immediately break into an animated conversation right after their reunion while imprisoned. They're just that happy to see each other.
  • Pete has a lot of faith in Jupiter. The moment he realizes that Jupiter was in the building, he had hope that he would find a way for all of them to escape, claiming he was the smartest person under the sun. Pete only lost heart when Jupe admitted he didn't know what to do.
  • When Shawn grabs Jupiter's shirt to confront him about being the 'mastermind' of all this, Pete instantly steps in to stop him. He was menacing enough that Shawn backs off (though he was also acting).
  • The moment Pete gets injured, Jolene begins to drop the act by confiding in Jupiter, realizing that the film experiment was not worth Pete's suffering and potentially his life. She immediately starts insisting that he needed a doctor right away and was the first to suggest that they just cancel the whole production. The most amazing part of this is that her compassion had allowed Jupiter to figure out what had happened to him and Pete and catch Thorndike in action. If she hadn't pulled Jupe aside to tell him about the 'emergency brake', Jupiter would have never realized what was happening.
  • William Boyd has actually been following the Three Investigators for a long while, not only as a fan, but wanting to make a movie or TV Show about them.

#124 Geister-Canyon (Ghost-Canyon)

  • Although Jupiter had considered the idea that Pete wanted to elope with the one million dollars because of how loosely he was joking around with running away with the money, Bob on the other hand had absolute faith that Peter would never do such a thing and he never did. In fact, Pete was the most distraught out of all of them when he the money was stolen from him and Bob was first to console him.

#127 Die schwarze Madonna (The Black Madonna)

  • Pete deciding to dive off a pier into shark-infested waters to save a stranger he didn't know because... well, he just wanted to help.
    • Right after his heroism, a reporter quickly jumps Pete, who is still a bit dazed by the whole thing, trying to get a story, but Jupiter appears and puts himself between his friend and the reporter.
  • Jupiter tries to strongarm his friends into continuing the case, but Pete and even Bob refuses to go because its too dangerous and how much trouble they got in. Later that night, Bob hears a noise outside his window and thinks its Jupiter trying to convince him to go, but it's Peter, who just can't abandon his friend after he finds that he left on his own. Seeing Pete Bob decides to go help Jupiter too.
  • When Jupiter gets into some serious trouble for breaking into Pentecost's house, both Bob and Peter's parents are rightfully miffed and tell both their sons not to hang out with him anymore. But of course, Bob and Pete are not going to so easily abandon their best friend and quickly mobilize
    • Aunt Mathilda is obviously upset at Jupiter for getting into such trouble and told him to just close down the detective business, but after hearing from Mrs. Gonzales tells her how much Jupiter had helped, she seemed to have a change of heart.
  • At the end of the story, Jupiter thinks that Inspector Cotta is going to take his Volunteer Police Badge, but Cotta explains since Jose testified for him and Pentecost got arrested, there wasn't anything to charge him on, telling in his exact words: "What am I supposed to do with this ID?"

#128 Schatten über Hollywood (Hollywood Horror)

  • Even though it was only Pete who made the bet with Jeffery, both Bob and Jupe accompanied him anyway.
  • While at the Hotel Pacific Pearl to look for Jupe, Pete gets cold feet after seeing how dilapidated and "haunted" the location was. But when Bob brings up their missing friend, Pete instantly changed his mind without another word and was about to charge in without a flashlight. His Undying Loyalty always wins in the end.

#132 Der Fluch des Piraten (The Curse of the Pirate)

  • Peter getting calmed from his panic attack by the sight of a stray cat and her kitten. After retrieving his bag, he even feeds them Aunt Mathilda's cake before he leaves.
    • As they set up camp for the night, both Bob and Peter try in vain to get the cats to come to them and sit on their laps. But the bigger of the two ends up snuggling with Jupiter instead, though eventually the two cats begin snuggling with them. Even when they were scared away by a loud sound, they came back to the three.
    • When Peter panics again after accidentally finding a human skeleton while trying to dive, he also gets calmed down by the sight of the two cats again.
    Peter: If the cats are fine, I'm fine too.

#134 Der tote Mönch (The Dead Monk)

  • As Peter is hanging on for dear life after he had almost fallen into an old garbage chute, Jupiter and Bob try hard to get him out. Bob doesn't hesitate to basically dangle into the hole with Jupiter hanging onto his feet to reach him.
    • When the Dead Monk shows up and threatens to push all of them in, Peter considers letting go of Bob to save his friends from falling with him, even if it meant falling to his death. Thankfully, they manage to pull him up and all of them are okay.

#145 Die Rache der Samurai (Revenge of the Samurai)

  • Both Pete and Zeno, without hesitation, deciding to save Sean by pulling him up from where he hung off the cliff, even though the latter had beat him on on the first day (Pete) and tried to kill him (Zeno). They're better than that.
    • On top of that, Pete deciding to intervene and risk his own life (getting slashed in the process) to save Zeno.

#146 Der Biss der Bestie (Bite of the Beast)

  • In order to make Sammy, who fell and cut his knee, feel better, Pete shows him a long scar he he got from slicing his arm open in 'Spur ins Nicht'. The young boy seemed to find it pretty cool.
  • Pete deciding to brave the hyena because he was unwilling to leave Bahamas the dog behind. With the kids safe, Pete could have just left for their own safety, but he ends up facing off with it, saves the dog, and even successfully tranquilizes the hyena.

#152 Skateboardfieber (Skateboard Fever)

  • Jupiter and Bob roleplaying taking on a client (Pete) in an effort to make him feel better after he had been almost gunned down the previous day. They are also proud of Peter's quick thinking he had to do to escape the gunmen.
  • The moment he suspects that something is wrong, Jupiter doesn't hesitate to lie to the police about where Peter is to protect him.
    Some strange story was going on here and Peter had to be protected.
    • Although Jupiter was lying, Inspector Cotta seemed relieved to hear that Pete was in London and was not the boy they were looking for.
  • Rubbish-George going out of his way to help Jupe and Bob get the memory from Pete's stolen camera. He traded some really valuable items for them and really didn't want anything in return. By this point, the three boys have become really good friends. He even helps them out with the operation in the end by bringing Inspector Cotta just in time to save Pete from getting arrested again.
  • Sunny helping out Pete even though he has no reason to trust a strange kid, especially someone wearing prisoner garb. He even affectionately nicknames Pete: "little lunatic" (joking that he must have escaped from the asylum) and sort of acts like a Cool Uncle to him. He gave Pete a new board and some new clothes, and even acted pretty protective when he thought a disguised Pete stole it from his new friend. The man even grapples with one of the secret service all because Pete asked him for a distraction. Honestly, a really stand up guy, Pete wouldn't have made it without him.
  • This quote from Pete's inner thoughts:
    "There were only two people he trusted unconditionally, and their names were Jupiter and Bob."
  • Inspector Cotta's Big Damn Heroes moment. He comes in just at the right time manages to stop the man from tackling him. He then protects Peter by "arresting" him.

#154 Der Meister des Todes (The Master of Death)

  • In the radio play, Bob's the one who jumps into the pool to retrieve Pete (as opposed to the novel which had Jupe inside the pool as well). Not only that, he sits with Pete after he is resuscitated to watch over him.
  • Jupe's reaction to seeing Pete alive. He just stands there, takes out his handkerchief, and blows his nose, indicating that he likely had been crying. In the end, all he can say is:
    Jupiter: Nice.
    Pete: (stunned) Is that all you have to say?
    Bob: You know Jupe. He would never admit he was worried.

#164 Im Schatten des Giganten (In the Shadow of the Giant)

  • Pete apparently has written a will already, just in case, but in that will, he included not only his parents, but Bob, Jupe, Kelly, and even Jeffery. He just doesn't want his love ones to fight after he's gone.
  • Despite his father dying during the rescue at the same cliffs, Randy doesn't hesitate doing the same to save someone else.

#190 Verbrechen im Nichts (Crime in Nothing)

  • Unlike Bob and Jupiter, who are understandably upset at being tricked, Peter instead is quite understanding of both why Brian and Ashlyn decided to make up the treasure hunt for them, especially since they seem genuinely sorry for tricking them. He seems pretty impressed by their ingenuity of their puzzles and even asks what the real solution was.
  • Feeling bad for what they've done, Ashlyn decides to go the treasure of candy they had hidden as a prize for the Investigators because of how upset both Jupiter and Bob were at them.
    • Later, Jupiter does both forgives Ashlyn and Brian for tricking them and apologizes for not taking her seriously when she was asking for his help.
  • Although what the Sheriff did was wrong and his actions led to Ashlyn and Peter getting into some real danger (and injuries in Peter's case), it was decided that for his sick wife's sake that he won't face any real consequences for his actions. He was essentially demoted and moved to another location for work, but at least he didn't have to move and his wife can continue living in the town of Nothing.

    Book #200+ (Modern Era) 

#201 Das weiße Grab (The White Tomb)

  • The first night at the hotel, Bob essentially reads a book to his two friends like a parent would read a book to their kids so they could fall asleep.
    So the third detective pushed the book aside. "To be continued tomorrow, colleagues."

#209 Kelch des Schicksals (Chalice of Destiny)

  • Bob acting like a Mom and gating Pete from taking painkillers because of their somewhat dubious origin.
  • In the end, Jupe's maternal family ended up getting arrested for their shady dealings, but his uncle Percival gifted him his mother's things, giving him closure.
  • The last lines of the book is Jupiter wanting to go back to Rocky Beach, eager to spend time with Peter and Bob.

#215 Die Schwingen des Unheils (The Wings of Doom)

  • Jupiter playing along with Jannik in a pretty wholesome big brotherly sort of way. He really just wants to question him about what he's seen, but after seeing that Jannik was playing firefighter, he plays along. For someone who doesn't want kids, Jupiter is still pretty good at talking to them sometimes.
    Jupiter: (pretending) Say... doesn't it smell of smoke in here? (points to an awning on the terrace) There! See, the fabric caught fire!
    Jannik: (saluting) No problem - the fire brigade is already here! (eagerly starts "putting out the fire")
    • Also during this, Jupiter gets accosted briefly by Lenny, a "crazy" white cat who seems all too eager to rub her face against Jupiter, who of course, offers her some pats.
  • Jupiter's heartfelt speech to Peter after the latter completely shuts down after the pipe bursts for a second time.
    With great difficulty, Jupiter moved towards his friend through the ever-rising water. Then he looked deep into his eyes.
    Jupiter: Peter Dustan Shaw, you weren't a good son, you are. And having vanquished the worst of gangsters, ghosts, monsters, and demons in our long career as detectives we're not about to drown in the basement of a wacky pensioner couple.
    Peter blinked several times and swallowed but didn't reply. Jupiter moved a little closer so that the boys' noses almost touched. Despite the roaring chaos around him, the First Investigator's voice was firm and unperturbed.
    Jupiter: I lost my parents. And I won't let your parents lose you too. Do you hear? I won't let them!
    Suddenly, the Second Investigator's vision cleared.

#218 Im Wald der Gefahren (In the Forest of Danger)

  • When Pete manages to wrench free from Ernie's grasp and to Bob's side, the latter instantly rips the tape off his mouth and stands 'protectively' in front of him, despite the man having a knife.
  • Ernie's ending. Turns out that he had never killed anyone at all and that he had been lied to his whole time. It is a weight off his chest and he is at peace with accepting his fate for what he's done, while also getting treated for his pneumonia that he had picked up in the woods.
    • Not only that, he apologizes to Peter, whom he had held hostage out of fear that he would tell others he was there. And Peter forgives him.

Specials and Live Shows

    Die drei Tag (The Three Days) 
Der Fluch der Sheldon Street (The Curse of Sheldon Street)
  • It's an incredibly hot day, Jupiter affectionately pets Blacky and promising him that he can play and bathe in the sink later today. Blacky is very happy to hear that.

Fremder Freund (Strange Friend)

  • Turns out that Hedra was a genuine fan of the Three Investigators and the way she fangirls over Pete is kind of adorable. She doesn't really have a crush on him or anything, she just likes Peter in the same way a young girl might like her favorite band. She even has a 'Peter Collection', a little weird, but Peter isn't bothered by it.
  • When Blacky gets kidnapped, the Investigators get extremely motivated to get him back. Goes to show even though they find him annoying sometimes, they really do care about their pet.
    • Even when Peter's beloved MG gets stolen, he declares that the stalker could keep the car if they just got Blacky back.
    Peter: I don't care if he can keep the car! I just want our mynah back.
  • When Peter "leaves" the Three Investigators and returns home completely heartbroken, his mother comforts him. Even though she is pretty against Peter sticking his neck in all the detective stuff and has tried even to ban him from participating in it, she still understands how much being part of it with his two best friends means to him. She straight up meets him in the front door and hugs him.
  • When Jupiter and Bob are trying to get a "replacement" for Peter after he "left", Annie, the waiter who served them yesterday and was a genuine fan of the three, gets genuinely upset at both Jupiter and Bob on behalf of Peter, claiming they just couldn't kick him out.
  • It was just a ruse, but Peter really was heartbroken when he "left" the Investigators. And both Jupiter and Bob knew all along that they would never abandon their Second Investigator. At the end of the story, the three friends and Blacky are all together again.
    Blacky wandered up and down in his box, croaking excitedly and the Investigators laughed until they cried. They were reunited. Everything was back to normal. Everything was good.

    Phonophobia 
Phonophobia - Sinfone der Angst
  • In the novel adaption, its pretty adorable how excited Pete gets after testing his Synesthesia. He was a little disturbed at first to find out that not everyone thinks of colors with words, sounds, and numbers, but becomes much more accepting of it after Jupiter performs some tests with him.
    Jupiter: She's in Ward A2.
    Bob: I'm sorry, what?
    Pete: (grinning) A2. That's green-purple for me.
    • Jupiter and Bob seem pretty amazed on Pete's behalf too!
    Bob: Pete, you actually couple colors with letters, sounds and numbers!

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