Cloudburst (1951)

"He had murdered once! NOW he was ready to strike again... and no one could catch him but HIMSELF!"

Canadian World War II veteran John Graham works in London as a code breaker. Tragedy strikes when his pregnant wife, Carol, is accidentally run over by two crooks who are speeding away from the scene of a murder. Haunted, grieving, and thirsting for revenge, Graham sets out to find the two fugitive murderers.