Outstanding performances, tense action, and Oscar-winning special effects highlight this WWII suspenser based on the Alistair MacLean novel. Gregory Peck, David Niven, and Anthony Quinn are members of a squad of Allied commandos whose mission to disable a powerful Nazi cannon battery on a remote island in the Aegean Sea is compromised when they learn there's a traitor in their midst. Richard Harris, Anthony Quayle, James Darren also star. 156 minutes. Two-disc set.