Birds and animals are being wiped out following an earthquake in the Kent countryside.

A strange kind of mud has started oozing from the fissure in Holly Mill Lane as the mystery deepens in the new town of Redlow.

Starring Roger Delgado and Maurice Denham.

Victor Pemberton's sci-fi mystery serial.

Hugh Deverill, MP …. Maurice Denham
Professor Josef Gomez …. Roger Delgado
Anna Deverill …. Marion Mathie
Professor Lippert …. Allan McClelland
Inspector Baxter …. Geoffrey Matthews
Professor Landers …. Rolf Lefebvre
Dr Ken Richards …. David Spenser
'Tug' Wilson …. Stephen Jack
Mrs Luke …. Noel Hood
Nursing Sister …. Eva Haddon
Janet Marshall …. Elizabeth Proud
Sorensen …. Fraser Kerr
RAF Corporal …. Anthony Hall
Barry …. Glyn Dearman

Special Effects: The BBC Radiophonic Workshop

Producer: John Tydeman

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