Barnaby Jones - Season 4 - Eps 1: The Deadly Conspiracy (II)
Cannon and Barnaby Jones investigate the death of a young woman who was about to expose the illegal activities of the large corporation she was working for. The crossover starts on Cannon S05E02 The Deadly Conspiracy (I).
About Barnaby Jones

Title: Barnaby Jones
First Air Date: 1973-01-28
Last Air Date: 1980-04-03
Status: Ended
Rating: 6.9/10 (from 27 votes)
Language: EN
Seasons: 8
Total Episodes: 178
Network: CBS
Genres: Crime, Drama, Mystery
Production Companies: Unknown
Synopsis
Barnaby Jones is a television detective series starring Buddy Ebsen and Lee Meriwether as father- and daughter-in-law who run a private detective firm in Los Angeles. The show ran on CBS from January 28, 1973 to April 3, 1980, beginning as a midseason replacement. William Conrad guest starred as Frank Cannon of Cannon on the first episode of Barnaby Jones, "Requiem for a Son" and the two series had a two-part crossover episode in 1975, "The Deadly Conspiracy".
Cast

Buddy Ebsen
Barnaby Jones

Lee Meriwether
Betty Jones

Mark Shera
JR Jones