 | Dean Martin als Matt Helm |
 | Elke Sommer als Linka Karensky |
 | Sharon Tate als Freya Carlson |
 | Nancy Kwan als Wen Yu-Rang |
 | Nigel Green als Count Massimo Contini |
 | Tina Louise als Lola Medina |
 | John Larch als MacDonald |
 | John Brascia als Karl |
 | Weaver Levy als Kim |
 | Wilhelm von Homburg als Gregor |
 | Bill Saito als Ching |
| Shuji J. Nozawa als Toki |
 | Pepper Martin als Frankie |
| Ted Jordan als Guard |
 | Chuck Norris als Man in the House of 7 Joys (uncredited) |
 | Cara Peters als Miss Milkmaid (uncredited) |
 | Ed Parker als Guard (uncredited) |
 | Lynn Borden als Miss Long Distance (uncredited) |
| Frank Biro als Diplomat (uncredited) |
 | Kenner G. Kemp als Officer in Hospital Room (uncredited) |
| Joe Lewis als Guard (uncredited) |
 | Noel Drayton als Lord Hardwicke (uncredited) |
| Phil Karlson | Director |
| Donald Hamilton | Novel |
| William P. McGivern | Screenplay |
| Irving Allen | Producer |
| Hugo Montenegro | Original Music Composer |
| Sam Leavitt | Director of Photography |
| Maury Winetrobe | Editor |
| Joseph C. Wright | Production Design |
| Frank Tuttle | Set Decoration |
| Sy Devore | Wardrobe Designer |
| Moss Mabry | Costume Design |
| Max Frankel | Property Master |
| Bruce Lee | Technical Advisor |
| Wayne Fitzgerald | Title Designer |
| Hank Edds | Makeup Artist |
| Harold F. Kress | Associate Producer |
| Ralph E. Black | Unit Production Manager |
| Jerome M. Siegel | Assistant Director |
| Charles J. Rice | Sound Supervisor |
| James Z. Flaster | Sound |
| Arthur Piantadosi | Sound |
| Ben Lane | Makeup Supervisor |
| Virginia Jones | Hairstylist |
| Bill Hickman | Stunts |
| Bill Couch | Stunts |
| Carey Loftin | Stunts |
| Joe Gray | Stunts |
| Gillian Aldam | Stunts |
| Bill Clark | Stunt Double |
| Gil Perkins | Stunts |
| Ed Parker | Stunts |
| Wally Rose | Stunts |
| Allen Pinson | Stunts |
| Mary Statler | Stunts |
| Bill M. Ryusaki | Stunts |
| Dale Van Sickel | Stunts |
| Fred Stromsoe | Stunts |
