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.
Genres: Action & Adventure , Drama , Sci-Fi & Fantasy
Keywords: admiring , alien , comforting , excited , nostalgic , scathing , space , time-travel , watch-full-episodes-online