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According to Glen A. Larson, Eddie Albert wanted to play Pete Ryan, so that his character could get the girl, when he eventually got Frank MacBride, instead, and came to work with a sweatshirt that went past his knees, and Albert's character was supposed to be the inexpensive police officer, that wasn't flashy.
This show was cancelled after season three. The last episode aired on July 9, 1978. In August of 1979, Robert Wagner returned to television in the pilot movie of Hart to Hart (1979) with Stefanie Powers and Lionel Stander.
Launched the television career of Sharon Gless.
Robert Wagner was married to Natalie Wood, in real-life. Near the show's cancellation, she had a very small scene.
Eddie Albert and Robert Wagner are the only two actors to appear in every episode of the series.