The great Billy Wilder is one of my top five favorite directors of all time, and this movie one of his best and possibly most underrated. Willam Holden won a Best Actor Oscar for this story about a group of Americans in a German POW camp in WWII, who come to suspect one of the guys in the camp is an informant. It's one of the great prison break movies and Otto Preminger, most known as a director in the 50's and 60's, here turns in a terrific acting performance as the Commandant. Definitely check this one out.
Original trailer from 1953:
