Morituri

German defector Robert Crain (Marlon Brando) is employed by the British to disarm the explosives on a freighter carrying a valuable load of crude rubber. On his deadly mission, Crain poses as a Nazi officer to gain entry onto the ship. But the freighter's captain suspects Crain's true motives and refuses him access to most of the ship -- including the cargo hold. A perilous game of cat and mouse then ensues.