Target Unknown (also known as Prisoner of War) is a 1951 American war film directed by George Sherman and starring Mark Stevens, Alex Nicol and Robert Douglas. An American bomber crew are forced to bail out over Occupied France in 1944 and are captured by the Germans, who subject them to strenuous interrogation. The film begins with a written foreword that reads: "In the making of this picture, the cooperation of the Department of Defense and the United States Air Force is gratefully acknowledged."