A London businessman concocts an intricate plan to murder his unfaithful wife for her money.
| Actor | Role |
|---|---|
 Angie DickinsonMargot Wendice | Margot Wendice |
 Christopher PlummerTony Wendice | Tony Wendice |
 Anthony QuayleInsp. Hubbard | Insp. Hubbard |
 Michael ParksMax Halliday | Max Halliday |
 Ron MoodyCapt. 'Swann' Lesgate | Capt. 'Swann' Lesgate |
| GGerry GibsonSgt. Williams | Sgt. Williams |
 Alan CoatesMan in Film | Man in Film |
 Dwight SchultzTV Director | TV Director |
| JJohn TouchstoneSgt. Thompson | Sgt. Thompson |
| LLeo LewisSgt. Pearson | Sgt. Pearson |
| CClement von FranckensteinMan at Party | Man at Party |