Cannon Season 2 Episode 21 The Seventh Grave ( Air Date 1973-02-28 ) Genre Drama, Action & Adventure category. Overview "One step forward, two steps back as Cannon hunts a mass murderer. Helping to cloud the facts: a police lab technician who's altering the evidence as quickly as it is found.".
Cannon Season 2 Episode 21 The Seventh Grave
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- Watch: Cannon Season 2 Episode 21 The Seventh Grave on CWR-CRB
- Stars: William Conrad, Charles Bateman, Tim O'Connor, Keith Andes
- Director: Harold Gast, Adrian Samish, John Carl Parker, Quinn Martin
