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.
| Name | Type | Role | |
|---|---|---|---|
| E. Arthur Kean | Writer | ||
| Barry Nelson | Guest Star | ||
| Robert Donner | Guest Star | ||
| 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 | ||
| John Badham | Director |