Cannon (1971–1976)
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Call Unicorn 

When a series of costly truck hijackings leads to murder, Cannon's brought in to capture the thieves.


Allen Reisner


David Moessinger (teleplay), Paul Playdon (teleplay) | 2 more credits »


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Episode complete credited cast:
William Conrad ... Frank Cannon
Wayne Rogers ... Steve
Patricia Smith ... Gwen O'Connor
Charles Cioffi ... Marty
Joe Maross ... Dave
Jenny Sullivan ... Sharon
Karl Lukas Karl Lukas ... Rettig
Rayford Barnes ... Dan O'Connor
William Vaughn William Vaughn ... Hotwire
Irene Gilbert Irene Gilbert ... Velma
Doris Lorentz Doris Lorentz ... Waitress
Kent Hays Kent Hays ... Charlie (as Kent Hayes)


When a series of costly truck hijackings leads to murder, Cannon's brought in to capture the thieves.

Plot Summary | Add Synopsis


Action | Crime | Drama | Mystery


Not Rated | See all certifications »






Release Date:

28 September 1971 (USA) See more »

Company Credits

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Technical Specs


Sound Mix:




Aspect Ratio:

1.33 : 1
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Did You Know?


The phone number on the dial that Cannon was using (about 15 minutes in) was 311-555-2368. This is the same number on many different phones seen in many different series. See more »

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User Reviews

Decent and unusual, but to see Cannon get in this many fights and win?!
30 May 2013 | by MartinHaferSee all my reviews

Wayne Rogers guest stars in this one. "Call Unicorn" begins with a trucker being murdered by a group of criminals within the trucking company. Apparently, they figured out that he's an investigator and they wanted to shut him up...permanently. Soon, Cannon is working at the same place--undercover and as an 18 wheeler driver! Oddly, apparently, Frank Cannon knows how to drive big rig trucks. However, to try to force the gang's hand and discover who their boss is, Frank plays it tough--very tough. This seems to be working when a monkey wrench is tossed into the works--the woman Frank is 'married to' (as part of his cover) is surprised when her sister shows up and wants to meet the new husband! This is a good episode--mostly because the plot is very unusual. I enjoyed it a lot but also laughed because there was so much fighting and Cannon kept winning! Seeing the very rotund William Conrad in all these scrapes was a bit surreal, that's for sure.

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