An interesting combination here: initially a story about ghosts appearing near the scene of a mining disaster, and then it veers wildly off into James Bond territory.
The feel of the two parts is very different: in the first part we have comedy with two rival ghost-hunting organisations, represented by the spiritual Pamela Ann 'Janley' Davy returning from Mission to Montreal and the scientific Vernon 'Chief Scientist' Dobtcheff returning from Room Without A View.
The second part on the other hand is quite sinister: similarities to Bond yes, but also the unsettling combination of ruthlessness and ridiculousness of the Village.
Previously and also seen: Julian Glover returning from Two's A Crowd, John 'Prof Krimpton' Cater making his third appearance.
Also seen: Jack 'Sgt Arnold' Woolgar.
Previously seen: Edward 'Zastor' Underdown from The Murder Market, Howard Marion Crawford from What The Butler Saw, Alister Williamson all the way from Hot Snow and Jack Watson from Silent Dust.