The movie Sabotage was also released under the title The Woman Alone. This movie was directed by Alfred Hitchcock. It is based off of the book The Secret Agent. The movie features the likes of Sylvia Sidney, Oskar Homolka, Desmnd Tester, and many other actors. The main character is named Karl. He is the owner of a cinema and also part of a terrorist gang. His gang is planning a series of attacks in the city of London. The movie did not mention what country he was from or the motives the gang had behind the attack. Scottland Yard detective suspect he is involved in some kind of terrosist plot. Detective Spencer is assigned to investigate him. In order to get more information he has to go under cover. Even Karl's wife starts to believe that he is part of a terror plot. A bus explodes killing her younger brother and many other people. The boy was carrying a bomb meant for someone else but was delayed on the bus when it exploded.
Karl confesses his involvement to his wife but blames his death on Scottland Yard. He carries the bomb the boy was carrying and makes the delivery himself. While night at dinner his wife stabs him to death. When the police come she starts to confess what she has done. The man that made the bombs for Karl sneaks into his home to destroy evidence. He accidentally sets a bomb off in the process. Her confession is interrupted and all the evidence of her crime is destroyed. She even forgets killing her husband and all she can remember is that her husband is dead. At the end of the movie she walks away with the detective from Scottland Yard.