Disappearing enemies and friends force Mannix into a blackmail investigation.
| Name | Type | Role | |
|---|---|---|---|
| Martin Roth | Writer | ||
| Paul King | Guest Star | ||
| Milton Berle | Guest Star | ||
| Joseph Reale | Guest Star | ||
| Tom Hallick | Guest Star | ||
| Nancy Burnett | Guest Star | ||
| Charles Picerni | Guest Star | ||
| Jack Denbo | Guest Star | ||
| Patricia McAneny | Guest Star | ||
| Frank Hotchkiss | Guest Star | ||
| Ron Nyman | Guest Star | ||
| Reza Badiyi | Director |