Francesca Annis as Tuppence

James Warwick as Tommy

Gavan O'Herlihy as Julius P. Hersheimmer

Alec McCowen as Sir James Peel Edgerton

Honor Blackman as Rita Vandemeyer

Peter Barkworth as Mr. Carter

Toria Fuller as Jane Finn

John Fraser as Kramenin

George Baker as Whittington

Donald Houston as Boris

Joseph Brady as Dr. Hall

Wolf Kahler as The German

Reece Dinsdale as Albert

Peter Lovstrom as Henry

Matthew Scurfield as Conrad

Holly Watson as Child on Beach

Phyllida Hewat as Woman in Tea Shop

James Walker as First Clerk

Mike Elles as Second Clerk

Gabrielle Blunt as Annie

Norman Hartley as Florist

Roger Ostime as Ritz Receptionist

Nicholas Geake as Watson

Simon Watkins as Man at Astley Priors

Steve Fletcher as Messenger Boy