Cannon
The Investigator
TV Flash files “The Investigator” as hour 92 of 120 in the TV Flash guide — Cannon (1971–1976) on CBS, season 4, episode 20, aired 1975-02-26, 60 min.
From the desk
How this hour is filed
This leaf is S04E20: listed hour 92 of 120 in the Cannon guide, hour 20 of 24 in season 4. It aired 1975-02-26 (60 min). The listed hour before it is “The Set Up” (S04E19). Next is “Lady on the Run” (S04E21).

Catalog log
Broadcast listing — not a TV Flash recap.
Cannon is hired to find proof that corrupt cops killed an investigative reporter.
Viewer FAQ
Where does The Investigator sit in the Cannon guide?
S04E20 is listed hour 92 of 120 — hour 20 of 24 in season 4, season 4 episode 20.
When did Cannon S04E20 air?
The Investigator aired 1975-02-26 and is listed at 60 minutes.
Is Cannon's size the joke?
No. Conrad's bulk is text, not a punchline. The series is a heavyweight PI who never auditioned as a pretty leading man and did not need to.
In the series
Why this series still plays
William Conrad's Frank Cannon is the heavyweight detective who never auditioned as a leading man and did not need to. Radio's Gunsmoke marshal finds a new generation via Lincoln Continentals and stubborn casework. A Quinn Martin mystery that stars a voice, a bulk, and zero apology.
So the group chat wants a pretty-boy PI in a tuxedo (Lana would call it a *gown of authority*) and then Cannon rolls up in a Lincoln Continental like that was the whole look. CBS, 1971–1976: William Conrad's Frank Cannon is overweight, expensive, and brilliant, and Edward Hume and Quinn Martin put him at the center of the early-1970s detective boom without asking him to audition as a leading man. Radio's Gunsmoke marshal found a new generation via stubborn casework and gourmet side trips. (I said spoiler-free.…
Filed against
- William Conrad as Frank Cannon
William Conrad’s Frank Cannon never auditioned as a leading man and did not need to — heavyweight detective, Lincoln Continentals, stubborn casework, a Quinn Martin mystery that stars a voice, a bulk, and zero apology. Radio muscle…