When an impostor of Martian Manhunter warns of an alien invasion, all the superheroes and supervillains are hunted down by the Persons in Plaid. Now the Martian Manhunter needs the help of Mystery Inc. to prove his innocence.
Using ballistics evidence, last weekend's football scores, and their third grade report cards, Velma reveals the identity of a ghost named Sir-Haunts-a-Lot. Sir-Haunts-a-Lot transforms and prepares to escape, but Shaggy, showing uncharacteristic bravery, suddenly runs up, knocks Sir-Haunts-a-Lot out and unmasks him. The others praise Shaggy for his bravery, but then a second Shaggy comes out of his hiding place. The first Shaggy reveals himself as J'onn J'onzz, AKA the Martian Manhunter.
The Martian Manhunter says he needs Mystery Inc.'s help, but due to the panic his presence is causing, turns invisible, promising to meet the gang later. Not long after his disappearance, two people, the Persons in Plaid, arrive, and question the gang about the Martian Manhunter's location. Daphne somehow knows where to meet the Manhunter, but decides not to say anything to the Persons in Plaid until they figure out what's going on.
Mystery Inc. later travels to a nearby toy store, where the Martian Manhunter is disguised as a teddy bear. He reveals himself and explains to the gang that "he" had went on TV and announced it was time for the aliens on Earth to rise up and seize control of the planet. With someone framing him, alien heroes, villains, and hybrids around the world have been rounded up and imprisoned by the authorities. He then goes on to show that he and several other alien heroes have gone into hiding for their own protection, including Jemm, son of Saturn, Starman, Starfire, and Ultra, the Multi-Alien.
Just as the aliens ask Mystery Inc. for their help, the imposter Martian Manhunter suddenly appears on TV again. Velma notices something strange on the screen, and Fred takes a picture of it so they can examine it more closely. Suddenly, the Persons in Plaid burst in, having followed Mystery Inc. to the aliens' hiding place. Starfire and Starman try to fight them off, but they have a force field protecting them. However, the Martian Manhunter is able to use his telepathic powers to put them to sleep.
With the Persons in Plaid incapacitated, Mystery Inc. and the aliens turn their attention to the photo Fred took. The Martian Manhunter sees a strange device he has never worn around the imposter's neck, and there's a building in the background of the photo that Starfire recognizes. Using this information, the group tracks the imposter to where the broadcast is coming from.
Disguised as Scooby, the Martian Manhunter turns invisible and slips into the building. With the help of the other aliens, they soon have the imposter apprehended. Crushing the device around his neck breaks the holographic projection, revealing the fake Martian Manhunter to be Professor Hugo. Professor Hugo admits that his plan was to frame the Martian Manhunter and get him locked up as revenge for the times the Manhunter has foiled his plans and gotten him locked up.
Just then, the Persons in Plaid storm in, revealing that Professor Hugo's camera was still recording and that his confession was just heard all over the world. All the alien heroes are set free, and Professor Hugo is arrested. Fred, however, unmasks the Persons in Plaid and reveals that they are aliens as well. The Persons in Plaid state that they were trying to bring in aliens so they could gather information on what was going on. They would have told them that at the toy store if they hadn't fallen asleep.
The Martian Manhunter thanks Mystery Inc. for their help, and for believing him when no one else would. Fred tells him not to mention it. After all, his full name is Fred Jones, and J'ones boys have to stick together.
- Martian Manhunter (single appearance)
- Jemm (single appearance)
- Starman (single appearance)
- Ultra (single appearance)
- Unnamed culprit (single appearance)
- Sir-Haunts-a-Lot (single appearance)(unnamed culprit's disguise)
- Professor Arnold Hugo (single appearance)
- Persons in Plaid (single appearance)(unnamed alien agents' disguise)
- Unnamed alien agents (single appearance)(redeemed)
- Queen Guinevere (only time mentioned)
- Kanjar Ro (single appearance)(no lines)(thought bubble)(cameo)
- Hawkman (no lines)(thought bubble)(cameo)
- Hawkgirl (no lines)(thought bubble)(cameo)
- Blue Beetle (single appearance)(no lines)(thought bubble)(cameo)
- Zook (single appearance)(no lines)(thought bubble)(cameo)
- Russian Starfire (only time mentioned)
- Barbarian freedom fighter Starfire (only time mentioned)
- Superman (poster)(cameo)
- Toy store
- Saturn (mentioned)
- Holographic disguise projector (destroyed)
|Unnamed culprit as Sir-Haunts-a-Lot||To steal Queen Guinevere's necklace.|
|Professor Hugo as imposter Martian Manhunter||To turn humanity against the Martian Manhunter.|
|Unnamed alien agents as the Persons in Plaid||They looked like they were hunting aliens, but really wanted their help.|
The following credits try to match how they are displayed in the comic as much as possible:
- Writer: Sholly Fisch
- Artist: Dario Brizuela
- Colorist: Franco Riesco
- Letterer: Saida Temofonte
- Cover: Brizuela & Riesco
- Assistant editor: Rob Levin
- Editor: Kristy Quinn
- Martian Manhunter created by Joe Samachson and Joe Certa
- The gang previously met Starfire in Teen Titans--Ghost, where she was based on her Teen Titans Go! appearance. She is taller and more mature looking this time, baring more resemblance to her design on the 2003 Teen Titans cartoon.
- Sir-Haunts-a-Lot is a parody of Sir Lancelot.
- The Men in Plaid/Persons in Plaid are a parody of Men in Black.
- One of the people Martian Manhunter shapeshifts into while showing off, resembles the thin Elvis Presley.
- None known.
Inconsistencies/continuity errors and/or goofs/oddities
- When the culprit of is accused, he suddenly appears in costume in a puff of smoke, just so he can be unmasked.