The Doctor and Ace arrive in Sydney in 1942. The Doctor contacts a ferry for a ride, then warns the captain to remove his vessel from the area. He confides to Ace that a Japanese submarine will soon torpedo an American warship. Soon they hear an explosion. Mrs Kitty Harris is waiting for her new billets, John Smith and Ace, to arrive. She hears the explosion. Corporal Jed Allum, leaving a dance with a girl, hears the explosion. Allum makes his way to his base, but is told to stand steady for now. He and the other men hear the USS Chicago return fire.