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: 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: All the action in this episode revolves around McKinley Rocket Base. All footage around the base is actually of Cape Canaveral, Florida, provided to Roddenberry by NASA.
Trivia: The painting on the wall in the office is an actual painting by Reginald Pollack.
Answer: After causing Norman to overload, all of the other androids shut down. The same could be said for the androids on the Enterprise.