

James Coburn guest stars as a ruthless German spy masquerading as an American G.I. in order to get into an American Batallion HQ to create havoc. The jeep he is in hits a land mine and Coburn's German Officer is wounded. Saunders and his squad bring him and the two other German infiltrators back to their Company HQ for first aid. Saunders slowly begins to suspect there is something wrong as Coburn's character makes slight mistakes while speaking and interacting with the other men.
Lee Marvin guest stars as a sergeant in command of a small demolition team that Saunders and his squad is ordered to take behind German lines to destroy a bridge. Lee Marvin does not believe the squad is large enough to handle the job of getting him to the bridge and back alive. He requests a platoon but is refused by Lieutenant Hanley. Marvin submits but has a huge chip on his shoulder due to a close friend being killed while on a similar mission. He has no confidence in Saunders or his men to get the job done and frequently ridicules them during the mission.