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...
Tom Baker , Elisabeth Sladen , Judith Paris , Roy Skelton , Glyn Houston , John Cannon , Renu Setna , Roy Boyd
BBC
