Impact is a 1949 film noir starring Brian Donlevy and Ella Raines. It was filmed entirely in California and included scenes at San Francisco's Fisherman's Wharf. The film was based on a story by film noir writer Jay Dratler. Millionaire industrialist Walter Williams has a young wife, Irene, who is trying to kill him with the help of her young lover, Jim Torrance. The plan falls apart when Williams survives a hit on the head from the would-be killer. Torrance flees the scene in Williams' car but dies in a head-on collision. At this point, it is believed that Williams was the driver. The dazed Williams ends up in a small town in Idaho. He gets a job as a service station mechanic and falls in love with Marsha, the station's owner. Meanwhile, the police arrest Williams' wife for his "murder." Marsha eventually persuades Walter to go back to clear his wife, but he is charged with the murder of the lover. That leaves Marsha and a kindly police detective named Quincy scrambling to prove his innocence. This was Anna May Wong's first screen appearance since 1942. Character actor Tom Greenway made his first appearance on screen as an unnamed moving van driver in Impact. Gary W.