Threatened by a mineshaft-dwelling terror, the inhabitants of Earth must depend on the Doctor to save them from an unspeakable fate. A special, two-part episode.

DVD Features:

Region (unknown)
Keep Case
Full Frame - 1.33
Additional Release Material:
Production Notes
Audio Commentary: 1. Katy Manning
2. Barry Letts
3. Terrance Dicks
Text/Photo Gallery
Global Conspiracy Mokumentary
Interviews: 1. Colon Mapson,
2. Robert Sloman,
3. Stewart Bevan (Clifford Jones)

Distributor Notes: The Doctor (Jon Pertwee) joins the Brigadier and Jo Grant in South Wales to investigate the death of a miner whose fatal disease has left his skin bright green.

Source: Warner Home Video

Jon Pertwee: British Comic Actor, the third Doctor Who