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...

Genres

Cast

Tom Baker

The Doctor

Elisabeth Sladen

Sarah Jane Smith

Stephen Thorne

Kastrian Eldrad

Roy Skelton

King Rokon

Glyn Houston

Professor Watson

John Cannon

Elgin

Renu Setna

Intern

Roy Boyd

Driscoll