The Stones of Blood: Part One 1978
7.6 289 On Earth to collect the third segment to the Key to Time, the Doctor and Romana encounter modern day druids in Cornwall making blood sacrifices to Cailleach, the goddess of war and magic, at a megalithic circle known as The Nine Travelers. The Tracer says the third segment is there, then says it isn't, which is very odd.
Runtime: 24
Starts: Tom Baker, Mary Tamm, Beatrix Lehmann, Susan Engel
Director: Darrol Blake