Mannix

Mannix is an American detective television series that ran from 1967 to 1975 on CBS. It 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.



Plot
Mannix worked originally for Wickersham at Intertect and then struck out on his own, assisted by Peggy Fair (whose cop-husband had been killed) and Police Department contact Tobias.

Season 5 ep. 13, “Catspaw"
Tip Ellis, a fellow private investigator and friend of Joe Mannix, is murdered while looking into a case of industrial espionage in Fresno. Mannix travels to Fresno to pay his respects, and also to look into the case his late friend was handling. In the meantime, a letter postmarked from Fresno arrives at Mannix' office -- possibly an effort by Tip Ellis to pass along information about the case to Mannix. That letter begins to take on great importance when someone takes extraordinary measures to steal the letter from Mannix' safe before he can read it