The McKenzie Break (1970) - Starring Brian Keith. Summary from IMDB, "In the closing days of World War II, riot and seige overcome a German Prisoner of War Camp in Northern England. "Fearful of a mass escape attempt, the British Army sends an unorthodox Irish Captain to the camp, in hopes of discovering exactly what is going on. The Irishman at once comes into conflict with the head German prisoner, a U-Boat Commander Kreigsmarine Captain, and the two must match each others wits, knowing that only one will emerge victorious."

I had never heard of this movie but watched it on MGM HD because I was sick of watching the Olympics. I really liked it even though it dragged towards the end.

"Force 10 from Navarone" was on right after it so I DVR'ed it and I plan to watch it sometime this week.