Home / Series / Cannon / Aired Order / Season 2 / Episode 21

The Seventh Grave

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.

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  • Originally Aired February 28, 1973
  • Runtime 50 minutes
  • Network CBS
  • On Other Sites IMDB
  • Created February 4, 2020 by
    Administrator admin
  • Modified February 4, 2020 by
    Administrator admin
Name Type Role
E. Arthur Kean Writer
Jeff Donnell Guest Star
Paul Tulley Guest Star
Shelley Duvall Guest Star
Lou Frizzell Guest Star
Laura Rose Guest Star
Jim Davis Guest Star
Tom Stewart Guest Star
Eldon Quick Guest Star
Barry Nelson Guest Star
Robert Donner Guest Star
John Badham Director