Richard Burton and Clint Eastwood go undercover behind German lines to rescue a high-ranking US officer who could give away plans of the Allied invasion of 1944. In the ripping adventure, written by Alistair MacLean, the officer is being held in a German castle, the men have to deal with countless obstacles and there may be traitors in their midst... With stunning locations, rousing performances and some great lines, this is an enthralling must-see war movie. Clint's character Lt Morris Schaffer kills more people than in any other Eastwood movie. MacLean later converted the script into a novel. Steven Spielberg voted this on C4 as his favorite war movie.

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