first broadcast in 4 weekly parts from August 30th to 20th September 1975
Source:- downloaded from Demonoid
MPEG-2, 720x576 25 fps (4:3) PAL
Dolby Digital (AC-3), 48000 Hz Stereo, 224 kbps (Monolingual)
this show taken from recent UK Drama broadcast with basic menus
Artwork for sleeve and disc
On an oil rig off the coast of Scotland, a strange, high pitched beeping sound echoes through the structure, and it begins to break apart, collapsing into the North Sea.
The Fourth Doctor, Harry and Sarah hitch a ride with a passing motorist to the town where the Brigadier and UNIT have set themselves up in an inn. The Brigadier is talking to Huckle, an official of Hibernian Oil, who owned the rig. Huckle complains that three such rigs have been destroyed in the last month, two of them belonging to Hibernian. The Brigadier assures Huckle that UNIT is also concerned, especially about the loss of life.....