A young woman who works at an oil company calls a congressional staffer promising to blow the whistle on her employer. This is overheard by the head of public relations who plots her death. A wine delivery man with a record is set up at the patsy for raping and killing the woman.

Frank Cannon (William Conrad) is hired by the an attorney for the accused, while the Congressional staffer hires Barnaby Jones (Buddy Ebsen), thus setting up a rare crossover between two TV detectives. Cannon had appeared in Barnaby Jones’s first episode.  Both programs were produced by Quinn Martin who used Cannon’s presence to jumpstart Barnaby Jones. Here the two detectives have both been on multiple seasons and would in effect be sharing star billing and solving the case together. 

This is a good story. Like many Quinn Martin detective shows, it was not a whodunit. Who is pretty clear from the start. However, there are all kinds of mysteries to solve along the way such as why, and what the goal of the titular “Deadly Conspiracy” is.

I liked a lot about the conspiracy. Their goal is complex, but it makes sense and also seems realistic and believable. While the conspirators are willing to kill for their goals, unlike other villains, they don’t just kill. They’re able to throw roadblocks in front of our heroes in ways that don’t involve homicide, which I think makes for a more interesting plot.

Both Conrad and Ebsen are given a chance to shine, and overall the team is very well-balanced with both playing nearly equal parts in the action and detective work. The guest cast is a notch above the typical guest cast with a lot of recognizable  actors including Diana Douglas and Francis De Sales.  Barry Sullivan shines as the chief villain.

There are two versions of the story available. The Season 5 DVD of Cannon contains a modified version of the story that’s trimmed down to a single episode of Cannon with an alternate (and in my opinion inferior) ending. The Season 4 DVD of Barnaby Jones collects both episodes and I recommend that version. While several episodes of existing programs were backdoor pilots for possible detective programs, this was the only crossover episode for two established 1970s Detective programs. It does its job well and deserves to be seen in its complete form.

Rating 4.5 out of 5

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