Sabotage, released in the United States as The Woman Alone, is a 1936 British espionage thriller film directed by Alfred Hitchcock starring Sylvia Sidney, Oskar Homolka, and John Loder. It is loosely based on Joseph Conrad's 1907 novel The Secret Agent, about a woman who discovers that her husband, a London shopkeeper, is a terrorist agent.


In London, sand is put into the bearings of an electrical generator, causing a power blackout. At a cinema owned by Karl Verloc (Oscar Homolka), people demand their money back. Verloc enters through a back entrance to the living quarters above. He washes sand from his hands, but when his wife (Sylvia Sidney) comes for him, he pretends to have been asleep. He instructs her to refund the money, saying he has "some money coming in" anyway. As the money is about to be disbursed to the customers downstairs, the lights go back on.