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.
Prof. Luke Williams

Lavinia Fullerton

Bridget Conway

Honoria Waynflete

Maj. Horton

Dr. Thomas

Const. Reed

Jimmy Lorrimer

Mr. Ellsworthy

Vicar

Rivers
Abbot

Lord Gordon Easterfield

Mrs. Pierce

Rose Humbleby
Avery
Attendant
