Modesty Blaise, a secret agent whose hair color, hair style, and mod clothing change at a snap of her fingers is being used by the British government as a decoy in an effort to thwart a diamond heist. She is being set up by the feds but is wise to the plot and calls in sidekick Willie Garvin and a few other friends to outsmart them. Meanwhile, at his island hideaway, Gabriel, the diamond thief has his own plans for Blaise and Garvin.
| Directing | Joseph Losey | Director |
| Writing | Evan Jones | Screenplay |
| Art | Jack Shampan | Art Direction |
| Sound | John Dankworth | Original Music Composer |
| Editing | Reginald Beck | Editor |
| Art | Richard Macdonald | Production Design |
| Camera | Jack Hildyard | Director of Photography |
| Production | Joseph Janni | Producer |
| Sound | Gordon Daniel | Sound Editor |
| Sound | John Cox | Sound Recordist |
| Sound | Buster Ambler | Sound Recordist |
| Costume & Make-Up | Pearl Tipaldi | Hairstylist |
| Directing | Gavrik Losey | First Assistant Director |
| Camera | Gerry Fisher | Camera Operator |
| Costume & Make-Up | Evelyn Gibbs | Wardrobe Master |
| Costume & Make-Up | Douglas Hayward | Costumer |
| Production | Mara Blasetti | Production Manager |
| Costume & Make-Up | Neville Smallwood | Makeup Artist |
| Costume & Make-Up | Marissa Martelli | Tattoo Designer |
| Production | Ed Harper | Production Manager |
| Directing | Claude Watson | First Assistant Director |
| Costume & Make-Up | Marissa Martelli | Costumer |
| Writing | Peter O'Donnell | Original Story |
