Absorbing and effective adaptation of Alistair MacLean's novel where a small team of Allied commandoes is sent to an Greek island that's occupied by the Germans and destroy two massive batteries that cover a crucial area in the Aegean Sea. The cast is pretty good all-around with Gregory Peck and David Niven are the standouts and the smooth direction of J. Lee Thompson make this movie an absolute gem that seems timeless. A first-class adventure.