The Agatha Christie Hour S01E03 - The Girl in the Train

Cast upon the world without a penny by his heartless Uncle William, young George Rowland decides to catch a train down to Rowland's Castle, a village which happens to bear his name. As George sits in the train at Waterloo Station, a young woman throws herself into his compartment, begging him to hide her from a mysterious enemy. George complies and finds himself embarking on an adventure.