Watch O.S.S.

Deep inside Nazi-occupied France, John Martin leads an O.S.S. team through the shadows to destroy a railroad tunnel and disrupt Axis troops during the Allied invasion. Surrounded by informants and tightening patrols, they race to gather critical intelligence, as every step threatens to expose their mission. As the enemy closes in, D-Day fast approaches.

O.S.S. is a 1946 drama with a runtime of 1 hour and 48 minutes. It has received mostly positive reviews from critics and viewers, who have given it an IMDb score of 6.7.