Watch Doctor Who Season 2 Episode 4 Online
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- COUNTRIES: United Kingdom
- Subtitles: English
Ian and Barbara believe the TARDIS has finally returned to their contemporary London, but soon discover signs of plague and warfare. Their old enemies, the Daleks, have invaded the Earth of the 22nd century. Separated and fighting for their lives, the travellers must try to aid the remaining humans and overthrow the Daleks' cruel tyranny. (Originally broadcast in six parts.)