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.