After the enforced absence of their father, the three Waterbury children move with their mother to Yorkshire, where they find themselves involved in several unexpected dramas along the railway by their new home.
Dinah Sheridan
as Mrs. Waterbury
Bernard Cribbins
as Albert Perks
William Mervyn
as Old Gentleman
Iain Cuthbertson
as Charles Waterbury
Jenny Agutter
as Roberta 'Bobbie' Waterbury
Sally Thomsett
as Phyllis Waterbury
Gary Warren
as Peter Waterbury
Peter Bromilow
as Doctor
Ann Lancaster
as Ruth
Gordon Whiting
as Russian
Beatrix Mackey
as Aunt Emma
David Lodge
as Bandmaster
