Charles Grodin as Howard R. Chesser

Candice Bergen as Maren Shirell

James Mason as Charles D. Watts

Trevor Howard as Clyde Massey

John Gielgud as Meecham

Helen Cherry as Lady Anne Bolding

Peter Vaughan as Coglin

Cyril Shaps as Wildenstein

Leon Greene as Max Toland

Jack Watson as Miller

Jack Watling as Fitzmaurice

Clive Morton as Sir Harold

Larry Cross as Whitman

Glynn Edwards as First Guard

John Bindon as Second Guard

Joe Powell as Hickey

Michael Gover as Doctor

Michael Hawkins as Patient

Patricia Michael as Stewardess