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The Sontaran Experiment (2)

The Doctor learns that Styre has been experimenting on the Galsec crewmembers to pave the way for a Sontaran invasion of Earth and decides the only way to halt his plans is to challenge him to a duel.
Aired: Mar 01, 1975 Genre: Drama Action & Adventure Sci-Fi & FantasyCasts: Tom Baker Elisabeth Sladen Ian MarterCreated By: Verity Lambert Sydney Newman Donald Wilson C. E. WebberProducers: Bob Baker Dave Martin Rodney BennettRating: 3.3 Country: United Kingdom Production: BBC