Tremors threaten a new town built in Kent.

But the bigger subterranean threat is yet to emerge...

Starring Roger Delgado and Maurice Denham.

Victor Pemberton's sci-fi serial in seven parts.

Professor Josef Gomez …. Roger Delgado
Hugh Deverill, MP …. Maurice Denham
Janet Marshall …. Elisabeth Proud
Dr Ken Richards …. David Spenser
Anna Deverill …. Marion Mathie
'Tug' Wilson …. Stephen Jack
Mrs Wilson …. Miriam Margolyes
Police Sergeant …. Wilfred Babbage
Inspector Baxter …. Geoffrey Matthews
Constable …. Anthony Jackson
Professor Landers …. Rolf Lefebvre
Professor Lippert …. Allan McClelland
Newscaster …. Nigel Graham

Special Effects: The BBC Radiophonic Workshop

Victor Pemberton was a writer and TV producer. As script editor on the BBC's Doctor Who, he was the brains behind the Sonic Screwdriver.

Producer: John Tydeman

First broadcast on the BBC Light Programme in February 1966. Show less