The Siege of Pinchgut (Four Desperate Men)

Sydney. Matt Kirk (Aldo Ray) is a prisoner intent on clearing his name. Together with fellow prisoners Bert (Victor Maddern) and Luke (Carlo Justini) and Matt's brother Johnny (Neil McCallum), he stages an escape on board a boat. When the boat runs aground on Pinchgut Island in the harbour, they take the keeper, Pat Fulton (Gerry Duggan), his wife (Barbara Mullen) and daughter Ann (Heather Sears). When a reprieve is refused, Matt and his colleagues threaten to use a cannon to blow up a ship in the harbour which is loaded with explosives.