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When John meets an alien who feeds on electricity, things start to go wrong
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
Mark Dightam
John
Robert Eddison
Nick
Helen Weir
Mrs Saunders
Brian Worth
Mr Saunders
Esmond Knight
Doctor
Laurence Carter
Schoolteacher
Patrick McAlinney
Supreme Beefeater
Lem Dobbs
Munro
Nigel Rathbone
Schoolboy (uncredited)
Encounters in the Deep
1979
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