Trivia

Patrick Duffy didn't own a swimsuit when he auditioned for the show; he had to audition in his one unripped pair of Fruit of the Loom briefs.

Patrick Duffy would inhale water into his nose and mouth while underwater to prevent air bubbles from escaping while he swam or "talked."

Patrick Duffy had to wear custom-molded hard contact lenses to give the luminescent eye effect when Mark Harris was without sunglasses. Victor Buono complimented Duffy on his tolerance for the lenses, saying it was "like trying to act with golf balls stuck in your head."

This was the first American television series purchased by the People's Republic of China.

Patrick Duffy had to shave his body to play Mark Harris. He originally used foam and a razor, saying he "took the longest showers you ever saw," but switched over to an electric shaver during the show's run.