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S12 E10
Season 12, Episode 10
•
Doctor Who
The Sontaran Experiment (2)
Mar 1 1975 • 25m
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.
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