When the junk men come by, they mistakenly empty Martin and Tim's garage instead of Mrs. Brown's, and in doing so take Martin's space ship. Mrs. Brown has no idea the name of the junk yard, but there was a witness to the incident: Booboo, a neighborhood dog. Booboo, with the help of his dog friends and acquaintances, helps Martin track down the junk yard. When Martin and Tim get to the junk yard, they find out that the ship has already been sold to a Mr. Carter, who is using it as a "rocket" carousel at a children's amusement park. Mr. Carter refuses to sell it back to Martin. So Martin decides to disappear and fly the spaceship away, although he does slip Carter the money for the ship anonymously. Martin has one other debt to pay: a steak dinner for Booboo and all his friends for all their help.

Martin needs the hardest substance possible to repair his spaceship, the substance he has in mind is silibalt, an alloy of silicone and cobalt but one that has not yet been invented on Earth. To make some, he needs a cyclotron. Rather than destroy Tim's kitchen making his own, he decides to follow Tim on his latest interview at the university, where there is a cyclotron. At the university, Martin meets Tim's interview subject, Donald Mumford, 13-year old physics genius, and one who is constantly at odds with the ways of Dr. Jackson, his advisor. While Martin and Donald get together to discuss and proceed with the making of silibalt, Tim is preoccupied with Dr. Jackson, who provides a diatribe against the demands of Donald, and Jeanine Carter, Dr. Jackson' pretty assistant and university protector of Donald. They are all looking for Donald and Martin when an explosion caused by some stolen electricity and wrong switch alert them to the Donald and Martin's whereabouts. Dr. Jackson immediately expels Donald, and since no long lasting physical damage was done, only banishes Martin from the university. Martin however fights back and convinces Dr. Jackson that he is quashing a genius mind, albeit one in a 13-year old body, and thus Donald must be treated differently in every respect. Doanld is welcomed back. On his own, Donald does manage to make some silibalt for Martin. Martin's only problem now is that he has no instrument hard enough to cut or mold the silibalt.

Martin and Tim are on their way to interview Professor Eugene Downey, the foremost expert on rocket fuel - Martin thinks the professor can assist in getting him back to Mars - when Martin is hit on the head with a monkey wrench. Martin gets amnesia from this concussion. He has no idea that he's a Martian, despite Tim telling him so. The only thing Martin and Tim can agree on is that Martin needs to go see a doctor. At Dr. Gilbert's office, Martin does learn that he has the power of levitation and the ability to disappear, still not quite believing why. The doctor, who witnesses the levitation, is told it's all magic. Back at the apartment, Tim almost has Martin convinced of his true identity when Martin is once again struck on the head, this time by a hammer. That's all he needed as he regains his memory. It's too late however: Professor Downey has already left town for good.

At the museum, Martin discovers that the long-time curator, Wilbur Canfield, is very unhappy. He has just acquired a new expensive Egyptian piece for the museum, but the museum's board is questioning the authenticity and therefore merit of this acquisition. Because of this, Canfield himself is now questioning his own abilities, as he feels he may be getting too old to do his work properly. The board is calling in an independent expert, Pietro Donati. What's worse, Canfield once discredited Donati's evaluation. Martin will know the piece's authenticity, if he can only get a look at it. In doing so, Tim can get an exclusive story and Martin can validate Canfield as an expert in the field. But the artifact is stashed away behind security until Donati's arrival. Since Martin can't get close to it, he decides instead to levitate it to him. After Martin finds that it is indeed authentic, he has to get it back to the museum. However security is aware that it's missing and thus the museum is secured even more than usual while they try to locate the artifact. After some tricky maneuvering, Martin does manage to get it back into place, although to the bewilderment of security. However, Martin forgot to check for the mark of Ra, which definitely identifies the artifact as authentic. When Donati arrives to inspect the piece, he deems it to be a fake since the mark of Ra is not there. However Martin tells him to look a little more closely under the couple thousand years of residue. The mark is indeed there. Therefore it ends well for Canfield and Donati. The only person with an unhappy ending is Tim - his exclusive story was so good, Mr. Burns appoints him editor of culture, which is not exactly his cup of tea.

After Martin makes Tim miss a deadline, Martin decides to help Tim get an exclusive interview. Jakobar, the rogue leader of Kobima, is the story's subject matter. Martin is a legend in Kobima and has inside knowledge of Kobiman legend since he was good friends with Jakobar's great-grandfather Kobima, for who the country was named. After displaying the sign of Cocobahn - Martin's name in Kobiman - Jakobar agrees to see Martin. Martin talks Jakobar into making himself accessible to the media, namely Tim, but later reneges since he still has the suspicious mind of an outlaw leader. Martin needs to convince Jakobar to be a more forthright leader for the betterment of Kobima, which will perish as a country otherwise, this strategy which again includes being accessible to the media. Because of Martin's sage advice, Jakobar muses that Martin may actually be Cocobahn.

Mrs. Brown is taking a course on how to be a private detective, and her first assignment is to prepare a dossier on an unsuspecting person. Her choice of subject is Martin. Of course, Martin knows what she's up to, but he is still a bit concerned about her discovering his Martian identity. Mrs. Brown finds Martin's flight log, which is written in Martian, but again Martin is concerned since the uneducated are too dense to know any better. She takes a photograph of it, which Martin is worried she will pass onto authorities, who, when they are unable to decipher it, will suspect him of being a foreign spy. She apparently has mailed the film to her teacher, J. Nathaniel Pierce, who is more shyster than teacher. Martin needs to apprehend the film before Pierce gets a hold of it. At Pierce's office, Martin searches to no avail, and must endure a sales job by Pierce before he finds out that the mailman can't and won't deliver Mrs. Brown's film since she failed to put postage on the package. From there, it's a an easy task of levitation for Martin to get the film and ultimately protect his identity. For Mrs. Brown's own safety, Martin tries to talk her out of taking the course since she will be facing brutish criminals. She heeds his advice: instead of quitting the course however, she decides to protect herself by also taking judo lessons.

Martin needs to electrically charge himself for his trip back to Mars. However he overcharges himself. He needs to rid himself of the excess electricity, and when he initially tries to discharge it, he blacks out half of Los Angeles. Martin is facing two problems. First, if he is overcharged for an extended period of time, he will exhibit unusual symptoms such as a plaid designed face. A current symptom is his continual sneezing which is causing electrical switches to turn on. And second, the power company is narrowing the source of the blackout to the O'Hara's neighborhood, and have called in the police to investigate the malicious tampering with the power grid. Martin figures the best course of action to discharge the electricity in a hurry is to do it direct at the source: the power house. In his invisible state, Martin hitches ride in the power truck that's come to investigate their neighborhood. After distracting the power man on duty, Martin manages to discharge his excess electricity safely back into the system. But once again, he's missed his opportunity to get back to Mars.

Martin needs to fly his space ship, which is deteriorating due to inertia. Tim's fear is realized: Martin's flight is spotted as a UFO. Martin needs to take another flight, but Mrs. Brown calls in the authorities - Jack and Jim being their representatives - who use Tim and Martin's apartment as a sighting station. Martin uses the opportunity to take his second flight since Jack and Jim have equipment - a plutron counter - that would be able to locate the space ship parked in the garage. The plutron counter does go off, but Martin slips some plutron into Mrs. Brown's apron pocket, making the plutron counter point in Mrs. Brown's direction. Jack and Jim think the machine has gone haywire. During Jim and Jack's kafuffle with Mrs. Brown, Martin slips away. While in flight, Tim further distracts Jack and Jim with a spoon dangling outside on their tree, which through Jack and Jim's telescope will look like a flying saucer. Martin takes his flight undetected and gets back to the apartment safe and sound. To further protect himself, Martin exposes Tim as the perpetrator of the flying saucer hoax - all in the name of getting a news story - with the spoon on the string as his proof of his claim.

The Earthly environment is causing a vitamin deficiency in Martin. He draws on energy and vitamins from everything and everyone around him. The effect on things is for them to go haywire. And if people look him in the eyes, they will fall asleep since they are sapped of their energy. Martin needs some vitamins immediately or else he will grow weaker and weaker to the point of no return. Luckily, the vitamins he needs can be found at any pharmacy, however by prescription. Also it's Sunday and all the stores are closed. But Tim convinces his good friend, Doc Mullen, to open his pharmacy. Martin's plan is that he will try and get the necessary vitamins while Tim distracts Doc Mullen. It does the trick and Martin starts on the course of his vitamins. However, Martin's illness is contagious and Tim gets it, which in turn causes Mrs. Brown, Doc Mullen and then Martin to fall asleep, with no more vitamins from Martin's stash to use. Thus Tim has to wake them all up without Tim or Martin in particular not to look at each other, as that will cause them both to fall asleep forever. With a lot of effort, Tim and Martin manage to do it as well as get the necessary refill of vitamins from Doc Mullen. Although Martin manages to get re-energized by the concoction, he is over-energized due to a higher than required dose, which in turn causes everyone else around him to feel over-energized. This can be cured by a good old everyday nap.

During an electrical storm, Martin gets an affliction called popsy, which causes him to appear and disappear uncontrollably. With Tim's help, Martin needs to long ground himself electrically to cure the popsy. Just as he does so, Mrs. Brown drops by and accidentally completes the grounding. In doing so, she gets Martin's levitation power. Martin temporarily fixes the symptom of appearing and disappearing by a concoction of household cleaners. But that is only in a need to get his levitation powers back from Mrs. Brown, which requires an electrically charged transfer. With much maneuvering and wiring and some hand holding (to control Mrs. Brown's levitation, but which she construes as Martin being affectionate with her), Martin manages to do the transfer successfully. After that, Martin and Tim need to try the grounding procedure once again. Just as they are about to do it, Mrs. Brown comes by once again, which Martin and Tim think will cause the transfer of the levitation power all over again. But Mrs. Brown fakes them out - this time, she doesn't cause a problem, and Martin's popsy is finally cured.

Martin convinces Tim to use his connections as a reporter to get Martin a tryout as the astronaut for a Mars destined rocket, privately financed by Omar M. Keck. Despite a slew of younger stereotypical astronaut types vying for the job, Martin's obvious advantages as a Martian get him the job. Before Martin is ready to leave, he allows Tim to prepare a story of his uncle "The Martian" for publication after Martin is on his way. On his way to the air force base with Martin, Tim leaves the tape of the story on Mr. Burns' desk - based on his usual schedule, Mr. Burns should arrive at the office after Martin and the rocket are safely in space. However the launch of the rocket is delayed, leaving Tim and Martin to rush back to the office to retrieve the tape. They rush back to base to watch the launch happen without Martin in the rocket. At least the launch was picture perfect!

Martin can't decide whether or not to return to Mars.

Despite Martin's warning, Tim brings an ESP expert home.

Martin's duplicating machine creates another Mrs. Brown.

A young boy hijacks Uncle Martin's spaceship.

A rainmaker offers his services during a dry spell.

A rabbit eats a Martian vitamin pill and becomes 6 feet tall.

Tim's enemies increase rapidly after he basks in Martin's benevolence bulb.

Despite warnings, Tim touches Martin's antennae and disappears.