1969 Mannix Robert Conrad in The Playground S03E04

Mannix is an American detective television series that originally aired for eight seasons on CBS from September 16, 1967, to April 13, 1975. The show was created by Richard Levinson and William Link, and developed by executive producer Bruce Geller. The title character, Joe Mannix, is a private investigator played by actor Mike Connors.
Mannix TV Series 1967–1975 TV-PG
Private detective Joe Mannix uses force to solve crimes.
Creators: Richard Levinson, William Link, Bruce Geller
Stars: Mike Connors, Gail Fisher
S3.E4 The Playground Episode aired Oct 18, 1969 TV-PG
Robert Conrad and Mike Connors in Mannix (1967)
Mannix is hired to look into who's trying to kill a movie studio's popular, but non-believing, arrogant male star.
Director: Paul Krasny
Writer: Ed Adamson
Stars: Mike Connors, Gail Fisher, Robert Conrad