At the dawn of the 20th century, following their father's arrest on suspicion of betraying state secrets, the three Waterbury children—Bobbie, Phyllis and Peter—move with their mother to Yorkshire, where they find themselves involved in unexpected dramas along the railway by their new home.

• EMI Films
• Dinah Sheridan
• Bernard Cribbins
• William Mervyn
• Iain Cuthbertson
• Jenny Agutter
• Sally Thomsett
• Gary Warren
• Peter Bromilow