Last updated 24 March 2024


Episode One

Series Episode Number: 350

World Premiere: Sat 19 May 1973 - 5:51pm BST [BBC One] (United Kingdom)
First Broadcast: Sun 18 Sep 1983 - 11:00pm CDT [WTTW 11 Chicago]
Running Time: 25 minutes 55 seconds

9.20 Million (UK)


Chart Position: 18 () (UK)

Recorded on Mon 02 Apr 1973 in TC3
Archive State: PAL 2 VT



In Wales, a dead miner is found glowing green. UNIT investigates and Jo empathises with the environmentalism of Cliff Jones who is opposing the pollution from Global Chemicals


Production Team hide uncredited
WriterRobert Sloman
WriterBarry Letts (uncredited)
DirectorMichael E Briant
ProducerBarry Letts
DesignerJohn Burrowes
Script EditorTerrance Dicks
Studio LightingMike Jefferies
Studio SoundRichard Chubb
Costume DesignerBarbara Kidd
Make-upAnn Rayment
Visual Effects DesignerRon Oates
Film CameramanBill Matthews
Film CameramanKen Lowe
Film SoundSimon Wilson
Film EditorAlastair Mackay
Incidental MusicDudley Simpson
Special SoundDick Mills
Title MusicRon Grainer
and BBC Radiophonic Workshop
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)