Other mistake: After Jack leaves The Apartment with Mr Angelino, Janet and Terri are sitting on the couch trying to figure out a way to get money for Jack. When Janet gets up you can see the bathroom door start to open behind her but there is no one else in The Apartment to open it.
Three's Company (1977)
1 mistake in Borrowing Trouble
Starring: John Ritter, Don Knotts, Suzanne Somers, Joyce DeWitt, Richard Kline
Genres: Comedy
Ralph Furley: Ohhhh, I'm through with women.
Jack Tripper: Aww.
Ralph Furley: Don't you get any ideas.
Trivia: In the episode where Janet asks Jack if she's a bad kisser, take a look at Janet when he kisses her. Jack unexpectedly slip Janet his tongue (which surprises the audience as well) and that throws Janet off and shocks her. Her surprised face is not acting, and was really surprised he did that. You'll also notice that when they part, she can't keep a straight face.
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Suggested correction: This does not happen, their kiss is closed and for 2 seconds and Janet doesn't ask about her kissing. She says before the kiss when they have few mishaps trying to kiss before the final kiss that no-one has ever picked her kissing before and his response was, "Just shut up and kiss me!" She responds, "Okay fine!" Then they kiss, mouth closed just lips.
Question: When Jack finds the expensive wine that Janet bought, he says that people can only afford that wine if they are "kings, millionaires, or auto mechanics." What is the joke about auto mechanics?
Answer: Because mechanics supposedly overcharge, they are thought to be rich.