After each Allied bombing of their harbor, the Germans use Allied POWs to rebuild it. HQ sends the Rat Patrol to liberate the POWs and halt the harbor's usefulness. Troy must coordinate his plans with Major Indrus (John Anderson), an American who is inside the camp. They use an explosive-laden boat to get into the harbor but the Germans stop it halfway in. The captain, Bertaine (Will Kuluva), doesn't allow the Germans to board his boat. Troy and his men are able to fight off the boarding party and escape into town, but at the cost of Bertaine's life. They are followed by El Gamil (Stanley Adams), a sympathetic Arab merchant and black marketeer, who provides a car and uniforms for Moffitt and Hitchcock to go to the German Officer's Club in search of Bertaine's daughter Marianne (Claudine Lo