Last updated 24 March 2024


Episode Two

Series Episode Number: 351

World Premiere: Sat 26 May 1973 - 5:50pm BST [BBC One] (United Kingdom)
First Broadcast: Fri 21 Nov 2014 - 8:30pm EST [Retro TV]
Running Time: 25 minutes 56 seconds

7.20 Million (UK)


Chart Position: 38 () (UK)

Recorded on Tue 03 Apr 1973 in TC3
Archive State: PAL 2 VT



Investigating the old mine workings, Jo and miner Bert become trapped beneath the surface when the lift is sabotaged. Bert touches some green slime and becomes infected.


Production Team hide uncredited
WriterRobert Sloman
WriterBarry Letts (uncredited)
DirectorMichael E Briant
ProducerBarry Letts
DesignerJohn Burrowes
Script EditorTerrance Dicks
Incidental MusicDudley Simpson
Special SoundDick Mills
Title MusicRon Grainer
and BBC Radiophonic Workshop
Fight ArrangerTerry Walsh
Studio LightingMike Jefferies (uncredited)
Studio SoundRichard Chubb (uncredited)
Costume DesignerBarbara Kidd (uncredited)
Make-upAnn Rayment (uncredited)
Visual Effects DesignerRon Oates (uncredited)
Film CameramanBill Matthews (uncredited)
Film CameramanKen Lowe (uncredited)
Film EditorAlastair Mackay (uncredited)
Film SoundSimon Wilson (uncredited)
Visual Effects AssistantRichard Conway (uncredited)
Visual Effects AssistantColin Mapson (uncredited)
Assistant Floor ManagerKarilyn Collier (uncredited)
Production AssistantJohn Harris (uncredited)
Production AssistantMichael McDermott (uncredited)
Technical ManagerFred Wright (uncredited)
Vision MixerJohn Gorman (uncredited)
Grams OperatorGerry Borrows (uncredited)
Costume AssistantRobin Stubbs (uncredited)
Costume AssistantSteve Pokol (uncredited)
Design AssistantPaul Trerise (uncredited)
Film Camera AssistantDick Lane (uncredited)
Film Camera AssistantGeorge Gibbins (uncredited)
Film Sound AssistantBrian Biffin (uncredited)
Film AssistantDennis Rogers (uncredited)
PropsRoy Osbourne (uncredited)
PropsDon Cattin (uncredited)
Props BuyerDave Lewis (uncredited)
Floor AssistantJames Piner (uncredited)
Inlay OperatorNick Rodger (uncredited)
Inlay OperatorGeoff Vian (uncredited)
Film Editor AssistantGordon Thompson (uncredited)
Director's AssistantBrenda Loader (uncredited)
Director's AssistantJudith Harris (uncredited)
Title Music ArrangerDelia Derbyshire (uncredited)
Title SequenceBernard Lodge (uncredited)