Trivia: This was the first cancelled TV show to be brought back. The only other cancelled shows to be brought back to date are "America's Most Wanted", "Cagney and Lacey" and Family Guy. I am happy to say that you can now add Farscape to this list, also Futurama.
Trivia: Scotty's line to Spock is, "Keep your Vulcan hands off me!" But the word "Vulcan" is indistinct and unfortunately, sounds rather like a certain obscenity starting with the letter F. This resulted in several TV stations across the US censoring that part of Scott's misunderstood line with a "Bleep." (00:25:00)
Trivia: The costume of the Salt Vampire from "The Man Trap" appears in Trelane's castle. It is in an alcove near the front door.
Trivia: William Campbell later appeared as Klingon captain Koloth in "The Trouble With Tribbles."
Trivia: This episode was originally intended to be a pilot episode for a spin-off show for the character Gary Seven. This is why Robert Lansing's name appears at the start of the show.
Trivia: Gene Roddenberry wanted "alien plants" for the planet's surface, but had trouble communicating the idea to the prop department. They sent dozens of lush, green potted specimens, all very terrestrial. A frustrated Roddenberry finally grabbed one potted tree, yanked it out of the soil and stuck it back in upside down with its bare, tangled roots exposed. "There," he grumped. "Now that's an alien plant!"
The Trouble With Tribbles - S2-E15
Trivia: One week after shooting, William Campbell (the Klingon captain) returned to the set and collected some of the Tribbles for children in his neighbourhood. But when the episode was eventually aired, he was swamped by requests for Tribbles.
Trivia: TV's first interracial kiss occurs here. But close examination reveals that Kirk's and Uhura's lips never actually meet. For fear of censorship, the kiss was simulated, so that complaints could be answered with "They only pretended to kiss." Despite this "out," however, the episode was still banned by several stations across the US. (00:42:40)
Trivia: Usually, when you see James Doohan's right hand, he has it closed to hide his missing middle finger (a wartime injury). When he is checking over the panels in Engineering, you see him holding a micro tape. If viewed closely, his hand is open, and you see he is missing his middle finger.
Trivia: This episode was not broadcast in the United Kingdom for many years due to the BBC deeming its content of the away team being beaten up by children being too scary for its time slot. It was finally shown on the BBC for the first time as part of a complete re-run of the series in the 1990s and nowadays is present in all re-runs of the show.
Trivia: At the very end, in talking about the future of the two characters, Spock says, "We could say that Mr. Seven and Miss Lincoln have some interesting experiences in store for them." While this seems like a strange thing for him to say, this episode was a "backdoor pilot" for a spinoff series with the same title (see Teri Garr's Wikipedia entry). But the idea wasn't sold and Mr. Seven and Miss Lincoln never had any further interesting experiences. The Enterprise's history log was evidently wrong.
Trivia: Some parts of the film Kirk and Spock watch are historical footage, some of it is made specially for this episode. If you look very closely you can see the Fuhrer Adolf Hitler in a car at one of his ceremonies. Beware he is hard to spot, because most of the time his head is behind some flags. (00:06:20)
Shore Leave - S1-E16
Trivia: "Shore Leave" was the first of many Star Trek episodes (and movies) partially shot at Vasquez Rocks, a distinctive California desert rock formation named for a 19th Century bandit who once had a hideout there. Kirk and Finnegan's fistfight and Kirk's encounter with Ruth were both shot at Vasquez. The formation is most prominently featured in "Arena," when Kirk pushes the boulder off its peak onto the Gorn.
Shore Leave - S1-E16
Trivia: William Shatner recalls having a "lame-brained" attack of bravado during "Shore Leave's" filming and insisting that Kirk should wrestle the tiger - without a stunt double. Gene Roddenberry finally convinced him that he was much too valuable to the show to risk his life for a stunt. Thirty years later on a Sci Fi Channel special, Shatner said, "Thank you, Gene, for preventing me from becoming a hair ball!"
Trivia: For her Orion slave girl dance, Susan Oliver was painted green from head to toe. But every time production footage of her came back from the processing lab, no trace of her green make-up job showed on film. After three rounds of Gene Roddenberry ordering the make-up crew to "paint her greener!" it was finally deduced that the lab techs, assuming her color was a lighting error, had been re-tinting her a nice, healthy pink every time.
Answer: After causing Norman to overload, all of the other androids shut down. The same could be said for the androids on the Enterprise.