Lifeboat

In the Atlantic during WW II, a merchant ship and a German U-boat are involved in battle, and both are sunk. The survivors - from a variety of backgrounds - gather in one of the lifeboats. Trouble begins when they pull a man out of the water who turns out to be from the U-boat.
Lifeboat

Like Rope and Rear Window, this is another Hitchcock classic that turns one cramped space into a world of suspense.
