George Segal

Howard Trapp

Trevor Howard

Gustave Kummer

Robert Morley

Emile Carpeau

Emlyn Williams

Bernard Laroque

Alan Webb

Joseph Pillet

Lesley Dunlop

Nicole

Brian Croucher

Pierre

Connie Booth

Helen Trapp

George Schaefer

Director

James Yaffe

Writer

Elizabeth Parker

Original Music Composer

Elizabeth Parker

Special Sound Effects

Friedrich Dürrenmatt

Novel

Hillard Elkins

Producer

Mort Abrahams

Executive Producer

Edie Landau

Producer

Ely A. Landau

Producer

Danny Steinmann

Associate Producer

John Green

Lighting Director