The Doctor and his companion Evelyn investigate a series of mysterious disappearances on the planet Chronos and once again encounter the dangerous Cybermen.
Upon discovering an abandoned home, a curious child conducts a seance and finds a friend within a kindly ghost who chooses to stay earthbound.
A man starts hearing a mysterious voice that tells him to hurt everyone around him.
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A woman fighting dementia and her desperate daughter undergoes experimental research to recreate memories, finally leading her to the truth and self-realisation.
