Robert Urich was nine years older than Catherine Hickland in real-life, even though his character, Dan Tanna, was the younger brother to Julie.
Greg Morris (as George the cop) mentions a pimp named 'Action Jackson' which, years later, would be the title of a movie (and character) starring Carl Weathers.
Greg Morris's character is named George Nelson. When he rejoined the cast full time in Lost Women (1978), he was renamed Dave Nelson.
In this pilot episode, Chick Venerra and Will Sampson are sidekicks to Robert Urich, and Bart Braverman has a small comic relief role. Then in the next episode (and for the rest of the series) Braverman played Urich's sidekick while Sampson and Venerra turned up occasionally (six episodes total for Sampson and three for Venerra).