A team of allied saboteurs are assigned an impossible mission: infiltrate an impregnable Nazi-held island and destroy the two enormous long-range field guns that prevent the rescue of 2,000 trapped British soldiers.

Gregory Peck
as Capt. Keith Mallory

David Niven
as Cpl. John Anthony Miller

Anthony Quinn
as Col. Andrea Stavros

Stanley Baker
as Pvt. 'Butcher' Brown

Anthony Quayle
as Maj. Roy Franklin

James Darren
as Pvt. Spyros Pappadimos

Irene Papas
as Maria Pappadimos

Gia Scala
as Anna

James Robertson Justice
as Commodore Jensen / Prologue Narrator

Richard Harris
as Squadron Leader Howard Barnsby RAAF
John Chard
Biffo - Bammo - Boffo! A team of army specialists are assembled with the task of infiltrating a German held Greek island. Then they have to destroy the mighty twin guns up in the hills that blight the British operations on the Aegean waters. Adapted from the Alistair MacLean novel, it's dire...