Who was the villain in 1903?
On Doctor Who Season 12 Episode 4, the Doctor and the gang crash-landed in 1903 and got straight to work.
They had to find out who was sabotaging Nikola Tesla's generator plant at Niagara Falls, and what it would mean for the future.
But the Doctor continued to worry about the face from the past that wanted to be her undoing.
What did she find out about the person, and how did she fight back?
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Paul Dailly is the Associate Editor for TV Fanatic. Follow him on Twitter.