O.S.S.

Alan Ladd

John Martin / Lt. (j.g.) Philip Masson, U.S.N.R. / Philippe Martine

Geraldine Fitzgerald

Miss Ellen Rogers / Madame Elaine Duprez

Patric Knowles

Cmdr. Brady

John Hoyt

Col. Paul Meister

Gloria Saunders

(W)omen's (A)rmy (C)orps Radio Operator Mary

Richard Webb

Frank Schmidt (O)perational (S)upport (P)ackages, (M)aterial, Maintenance, Management, U.S.N.R. / Parker

Richard Benedict

Robert Bouchet, Tech Sgt., A.U.S. / Albert Bernardi

Harold Vermilyea

Amadeus Brink

Don Beddoe

Rodney "Gates" Parrish / Raoul Josse

Onslow Stevens

Field

Gavin Muir

Col. Crawson

Egon Brecher

Marcel Aubert

Joseph Crehan

Gen. Donovan

Bobby Driscoll

Gerard

Julia Dean

Madame Prideaux

Crane Whitley

Arnheim

Dorothy Adams

Claudette (uncredited)

John Dehner

German Radar Captain (uncredited)

Frank Ferguson

Electronics Engineer (uncredited)

Leo Schlesinger

German Soldier (uncredited)

Carl R. Botefuhr

American Soldier (uncredited)

George Bruggeman

MP NCO (uncredited)