Doctor Who: The Hand of Fear

Directed by Lennie Mayne

With Tom Baker, Elisabeth Sladen, Stephen Thorne, Judith Paris and Roy Pattison

When the TARDIS lands in a quarry on Earth, Sarah unearths what appears to be a fossilised hand, buried in one-hundred-fifty-million-year-old strata. Analysis shows the hand to be silicon-based and inert, but when Sarah begins to act as if possessed, the Doctor suspects that it may still be alive...