David Soul's performance as Inspector James Martin led to his being cast as another San Francisco cop, Officer John Davis in the Dirty Harry movie sequel Magnum Force (1973).
Both David Soul and Paul Michael Glaser, who would star in a later episode, would go on to star in their own series Starsky and Hutch.
Two actors from the 1960 film The Magnificent Seven (1960) were "reunited" but had no scenes together: Valentin de Vargas, who played "Santos, Calvera Henchman (uncredited)" and Pepe Hern who played "Tomas" , one of the three natives of the town that hired the original seven.