While on a train from his home in the countryside to stay with his grandmother in London, a boy named Emil suspects that he has been robbed of his money by a suspicious-looking man in the same carriage wearing a bowler hat.

John Williams as Emil Blake
George Hayes as The Man In The Bowler Hat - Sam Pinker
Mary Glynne as Mrs. Blake
Clare Greet as Grandma
George Merritt as PC
Marion Foster as Polly
Donald Pittman as Gussy
Robert Rietti as Professor
John Singer as Tuesday
Derek Blomfield as Jerry
Norman Atkyns as Man
Ricky Hyland as The Flying Stag

Directed by Milton Rosmer