Four children dream of escaping the tedium of a summer holiday with their mother. When finally given permission to camp on their own on an island in the middle of a vast lake, they are overjoyed. But when they get there they discover they may not be alone… The battle for ownership of a lonely island teaches them the skills of survival, the value of friendship and the importance of holding your nerve.
Dane Hughes
as John Walker
Orla Hill
as Susan Walker
Teddie-Rose Malleson-Allen
as Tatty Walker
Bobby McCulloch
as Roger Walker
Seren Hawkes
as Nancy Blackett
Hannah Jayne Thorp
as Peggy Blackett
Rafe Spall
as Jim 'Captain Flint' Turner / Polski the Parrot
Kelly Macdonald
as Mrs. Walker
Andrew Scott
as Lazlov
Harry Enfield
as Mr. Jackson
Jessica Hynes
as Mrs. Jackson
Sophie Wardlow
as Gertie
