Quick Plot Summary: Released in 1946, O.S.S. is a War, Thriller, Action, Drama film directed by Irving Pichel, written by Robert Thoeren. The narrative presents a compelling narrative that engages viewers from start to finish. It provides a scannable look at the movie's central conflict involving Alan Ladd as John Martin / Lt. (j.g.) Philip Masson, U.S.N.R. / Philippe Martine.