Doctor Who - Season 21 - Eps 21: The Twin Dilemma (1)
Earth, the future. The genius Sylvest twins, child prodigies, are kidnapped by the mysterious Professor Edgeworth and taken to the planet Jaconda. But who is Edgeworth? Why does he serve the giant slug Mestor? And what is Mestor's plan?
About Doctor Who

Title: Doctor Who
First Air Date: 1963-11-23
Last Air Date: 1989-12-06
Status: Ended
Rating: 7.869/10 (from 666 votes)
Language: EN
Seasons: 27
Total Episodes: 694
Network: BBC One BBC Television
Genres: Drama, Action & Adventure, Sci-Fi & Fantasy
Production Companies: BBC
Synopsis
The adventures of The Doctor, a time-traveling humanoid alien known as a Time Lord. He explores the universe in his TARDIS, a sentient time-traveling spaceship. Its exterior appears as a blue British police box, which was a common sight in Britain in 1963 when the series first aired. Along with a succession of companions, The Doctor faces a variety of foes while working to save civilizations, help ordinary people, and right many wrongs.
Cast

Sylvester McCoy
The Doctor

Sophie Aldred
Ace