Family Sci-Fi
John and his class visit the Tower of London, where he loses his pet mouse. He falls asleep during a lesson on electricity, but with some help, he learns about it, invades the Tower, and saves his pet.
Directed by
Michael Powell
Esmond Knight
Doctor
Robert Eddison
Nick
Brian Worth
Mr Saunders
Mark Dightam
John
Helen Weir
Mrs Saunders
Laurence Carter
Schoolteacher
Patrick McAlinney
Supreme Beefeater
Nigel Rathbone
Schoolboy (uncredited)

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