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.

• Carlton Television
• Clare Thomas
• Jack Blumenau
• Jemima Rooper
• Jenny Agutter
• Michael Kitchen
• Gregor Fisher
• Amanda Walker
• Clive Russell