Hauptmann Kloss (Captain Kloss) is a fictional World War II secret agent appearing in the 18-episode 1967-1968 Polish television series Stawka większa niż życie (Direct Translation: More Than Life at Stake; DVD Movie Translation: Playing for High Stakes; Popular Translation: You Bet Your Life), following earlier live television theater plays. It was, and still is, widely popular in Poland.
He is actually a Pole, named Stanisław Kolicki. He is an officer of Polish Intelligence in rank of a major, working for Soviet Intelligence. He impersonates a Nazi Abwehr officer, Hans Kloss, of whom he is a look-alike, in order to wreak havoc inside German intelligence services and armed forces. The switch is accomplished after the real Hans Kloss is arrested spying behind the Soviet front lines. Following appropriate preparation, the look-alike Kolicki is allowed to "escape" back through the front lines and return to Abwehr service. While there, he hurts the German efforts in all sorts of inventive ways. Throughout, he manages to make himself appear trustworthy and advance in the German ranks, while at the same time making the Germans suspect each other about being defectors, traitors or agents themselves, often resulting in their executions.