Fiona Richmond as Fiona

Donald Sumpter as Mark

Anthony Steel as Robert

Victor Spinetti as Duncan

Ronald Fraser as Marty

Joan Benham as Norma Blackhurst

Graham Crowden as Lord Yardarm

Graham Stark as Inspector Flaubert

Percy Herbert as Hubert

John Hamill as Daniel

Harry H. Corbett as Art

John Clive as Willi

Eddie O'Dea as Buddy

Linda Regan as Secretary

Heather Deeley as Assistant

Helli Louise as Third 'Men Only' Girl (uncredited)

Patricia Bourdrel as Madeleine