The (O)ffice of (S)trategic (S)ervices' Cmdr. Brady (Patric Knowles) forms Operation "Applejack" (based on a composite of actual incidents during WWII) and sends Lt. (j.g.) Philip Masson, U.S.N.R. aka John Martin as spy Philippe Martine (Alan Ladd) along with Miss Ellen Rogers posing as her college roommate, Madame Elaine Duprez (Geraldine Fitzgerald) and Robert Bouchet, Tech Sgt., A.U.S. as Albert Bernardito (Richard Benedict) to acquire secret Nazi plans. After nearly getting caught they succeed and get new identities. However they discover a secret that could change the war and risk their lives to get the information back to London before it jeopardizes their lives.
Alan Ladd
as John Martin / Lt. (j.g.) Philip Masson, U.S.N.R. / Philippe Martine
Geraldine Fitzgerald
as Miss Ellen Rogers / Madame Elaine Duprez
Patric Knowles
as Cmdr. Brady
John Hoyt
as Col. Paul Meister
Gloria Saunders
as (W)omen's (A)rmy (C)orps Radio Operator Mary
Richard Webb
as Frank Schmidt (O)perational (S)upport (P)ackages, (M)aterial, Maintenance, Management, U.S.N.R. / Parker
Richard Benedict
as Robert Bouchet, Tech Sgt., A.U.S. / Albert Bernardi
Harold Vermilyea
as Amadeus Brink
Don Beddoe
as Rodney "Gates" Parrish / Raoul Josse
Onslow Stevens
as Field
Gavin Muir
as Col. Crawson
Egon Brecher
as Marcel Aubert
