Burt Lancaster

as Michael (Mike) Davis

Paul Henreid

as Commandant Paul G. Vogel

Claude Rains

as Arthur 'Fred' Martingale

Peter Lorre

as Toady

Corinne Calvet

as Mademoiselle Suzanne Renaud aka Aniseneletette Duringreaud

Sam Jaffe

as Dr. Francis Kittridge Hunter

John Bromfield

as Thompson (guard)