Doctor Who: Planet of the Spiders
Overview
The blue crystal that the Doctor took from Metebelis III in a previous adventure is desperately sought by the Eight Legs, a race of mutated spiders, as the final element in their plan for universal domination. With help from an old mentor, the Doctor realises the only way to foil the plot is to make the ultimate sacrifice. The Doctor must risk death to return to the cave of the Great One and save the universe.
Trailer
Cast

Jon Pertwee
The Doctor

Tom Baker
The Doctor

Elisabeth Sladen
Sarah Jane Smith

Nicholas Courtney
Brigadier Lethbridge-Stewart

Richard Franklin
Mike Yates

John Levene
Sergeant Benton
John Dearth
Lupton
Carl Forgione
Land
Andrew Staines
Keaver
Terence Lodge
Moss
Christopher Burgess
Barnes
John Kane
Tommy