Murder Is Easy 1982

Directed by Claude Whatham | Starring: Helen Hayes, Olivia de Havilland, Lesley-Anne Down, Bill Bixby

American computer whiz Luke Williams meets elderly Lavinia Fullerton on a London-bound train. She reveals she's discovered the identity of a serial killer in her village and is going to report it to Scotland Yard. When she is murdered after disembarking the train, Williams vows to pursue the case himself.