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.
| Tagline | When John meets an alien who feeds on electricity, things start to go wrong |
| Release Date: | Sep 16, 1972 |
| Genres: | Family, Science Fiction |
| Production Company: | Children's Film Foundation (CFF) |
| Production Countries: | United Kingdom |
| Casts: | Mark Dightam, Robert Eddison, Helen Weir, Brian Worth, Esmond Knight, Laurence Carter, Patrick McAlinney, Lem Dobbs, Nigel Rathbone |
| Status: | Released |
| Budget: | $45000 |
| Revenue: | 0 |
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