The TARDIS materialises in a quarry just as the rock face is blasted away by open cast miners. Sarah-Jane is buried and when the Doctor and the miners dig her out, she is grasping a hand made of rock incredibly tightly. Soon, under it's influence, she breaks into a nuclear power plant and places the hand in the radio-active core; soon it starts to regrow a body and gains a life of it's own.

DVD Extras: Audio commentary by Tom Baker (the Doctor), Elisabeth Sladen (Sarah Jane Smith), Judith Paris (Eldrad), Bob Baker (co-writer), Philip Hinchcliffe (producer)
'Changing Times': a documentary charting the special relationship between the Doctor and his companion Sarah Jane Smith (50 mins)
A very rare clip of Tom Baker and Elisabeth Sladen's appearance on the first ever edition of Noel Edmonds' Multi-Coloured Swap Shop, shown in October 1976
Photo gallery
Continuity announcements
Information text subtitles
1977 Doctor Who Annual (pdf format)
Radio Times listings (pdf format)
Easter Egg (hidden feature)

The TARDIS materialises in a quarry just as the rock face, starring Tom Baker as The Doctor

Dr Who, tom baker, hand of fear