Watch Doctor Who: The Stones of Blood (1978) Online
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- RUNTIME: 1h 40m
- COUNTRIES: United Kingdom
- Subtitles: English
Searching for the third segment to the Key to Time brings the Doctor and Romana to present-day Earth, where the travellers have to contend with stone circles, Druidic rituals and a not-so-mythical goddess known as the Cailleach.