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.
| Creator | Edward Hume |
|---|---|
| Actor | William Conrad |
| Country | United States of America |
| Production | Quinn Martin Productions (QM) |
| Season 0(2 episode) |
|---|
| Season 1(24 episode) |
| Season 2(24 episode) |
| Season 3(26 episode) |
| Season 4(24 episode) |
| Season 5(25 episode) |
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