Other mistake: The apartment is technically supposed to be right over Jack's bistro (a lone apartment by itself), but whenever the front door is open, there are other apartments and a presumed hallway showing. Also, if this IS supposedly the only apartment over the bistro, how is it that it is a completely different looking apartment than the original one shown in the Three's Company episode where Jack caught Mr. Angelino attempting to cheat on his wife?
Three's a Crowd (1984)
1 other mistake in show generally
Starring: John Ritter, Alan Campbell, Mary Cadorette
Genres: Comedy
Visible crew/equipment: When Jack goes out to the main room half clothed to answer the door, the tip of the boom drops several times on the way out, and when he 'stumbles' backward. Then, when he and Vicki are seated while having dinner with her father, you can hear cabinet doors opening and closing from somewhere on set, and a bit of equipment moving around behind Vicki.
Trivia: This episode is the only one with any references to "Three's Company." Larry Dallas made a guest appearance, but he (and all the other main cast members) are never seen or mentioned in any other episode.