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Factual error: In the 5th episode of season 5, "Thick as Thieves", look at the area by the door when we see Margot and Spencer in the hotel room in 1989. The light switch is a flat "Decora" switch, and above the door handle is a black box that houses electronics for a "card key" system. The light switch was not introduced until the 1990s, and while the card key system was introduced in 1985, only very expensive hotels afforded the conversion costs - and the hotel they're at isn't exactly the Hilton.
Factual error: In episode 2-21: "Creatures of the Night," Mike and Kelly are at the theater watching "Rocky Horror Picture Show" in 1977, talking during the song "Sweet Transvestite." After the line "satanic mechanic" and the audience callback "S and M.", which is only about two thirds of the way into the song, the music suddenly crescendos and ends, to be replaced by the song "Touch-a Toucha-a Touch Me," which occurs several scenes further into the movie.






