Watch on SFlix. A comprehensive documentary detailing the making of 'Hacksaw Ridge', including the real-life people and story, casting, filming, special effects, stunts, and interviews with Mel Gibson, Andrew Garfield, and more. 'Hacksaw Ridge' is the epic and inspiring true story of Desmond Doss, an army medic and conscientious objector who, during one of the bloodiest battles of World War II, saved 75 men without firing or carrying a gun.