An assassination plot is revealed in the course of Mannix's investigation.
| Name | Type | Role | |
|---|---|---|---|
| Alfred Hayes | Writer | ||
| Victor Canning | Writer | ||
| Erik Holland | Guest Star | ||
| Mike Robelo | Guest Star | ||
| Alexander Scourby | Guest Star | ||
| Jorge Cervera Jr. | Guest Star | ||
| Dimitra Arliss | Guest Star | ||
| Tony Cacciotti | Guest Star | ||
| Richard Evans | Guest Star | ||
| Kenneth O'Brien | Guest Star | ||
| George Skaff | Guest Star | ||
| Robert Loggia | Guest Star | ||
| Peter Elbling | Guest Star | ||
| Pilar Del Rey | Guest Star | ||
| Andrea Marcovicci | Guest Star | ||
| Michael O'Herlihy | Director |