Among the series guest stars were Leslie Nielsen , William Windom , Ed Asner , Vincent Price , Sammy Davis Jr. , Andy Griffith , Richard Pryor , Lee Grant , Richard Dreyfuss , Jo Van Fleet , Tom Bosley , Danny Thomas , Tyne Daly , Martin Sheen , Louis Gossett , Jr. , Sugar Ray Robinson , Billy Dee Williams , Cleavon Little , Barbara McNair and Rodolfo Hoyos , Jr. , in three episodes.
Jon Van Fleet was a guest star in The Mod Squad .