AFTER SEVERAL ESCAPE ATTEMPTS FROM A GERMAN POW CAMP ARE FOILED, THE PRISONERS SUSPECT THAT THERE IS AN INFORMER IN THEIR MIDST. TO COVER UP ABSENT ESCAPEES, THE BRITISH INMATES CREATE A DUMMY PRISONER, CHRISTENED ALBERT, WHICH THEY USE DURING ROLL CALL TO DECEIVE THE GERMAN GUARDS. STARRING ANTHONY STEEL, JACK WARNER, ROBERT BEATTY, WILLIAM SYLVESTER.