A staged U-boat attack at the Royal Tournament at Olympia, London.
Full titles read: "THE BIG THRILL - of the Royal Tournament is the dramatic reproduction of a U-boat attack on one of our mystery ships."
L/S's from the main arena. Various shots of large model ship moving around the arena, a smaller model submarine can be seen lurking in the corner getting ready to strike! There is a sudden flash from the turret of the sub! M/S of smoke pouring from the ship. M/S of the the ship retaliating against the sub. L/S of survivors making their escape by rowing boats.