'Doctor Who' reanimated: See the long-lost first regeneration - CNET

"Power of the Daleks" hasn't been seen since 1966, but it's been lovingly restored for its 50th anniversary.

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https://www.cnet.com/news/see-doctor-who-first-regeneration-on-periscope-in-reanimated-lost-episodes/#ftag=CAD590a51e