Stalag 17 (1952) DVD
 
During World War II, a group of G.I.s are thrown together in the notorious German prison camp Stalag 17. For the most part, they spend their time scheming ways to help each other escape. But when two prisoners are killed in an escape attempt, it becomes obvious that there is a spy among them. William Holden was awarded an Oscar for his performance as a cynical, sharp-tongued soldier who spends his time scheming up rackets and trading with the Germans for special privileges.
 
This classic comedy drama from the great Billy Wilder remains the grandaddy of all POW movies