When does Mannix return?

Joe Mannix is an American detective television series that aired for eight seasons on CBS from September 16, 1967 to March 13, 1975. The show was created by Richard Levinson and William Link, and developed by executive producer Bruce Geller. The title character is a private investigator played by Mike Connors. Mannix's most frequently used contact is Lieutenant Art Malcolm, played by Ward Wood.
During the first season of the series, Joe Mannix works for a large Los Angeles detective agency called Intertect, which was the planned original title of the show. As opposed to the other employees, Mannix belonged to the classic American detective archetype, thus he usually ignores the computers' solutions, disobeys his boss's orders, and sets out to do things his own way. Mannix also has a working relationship with the Los Angeles Police Department as he exchanges information with his contacts.