When a fissure explosively opens in an English mud flat during a military exercise there, injuring one soldier and killing another, an American research scientist at a nearby nuclear plant joins with a British investigator to discover why the victims were radioactively burned and why, shortly thereafter, a series of radiation-related incidents are occurring in an ever-growing straight line away from the fissure.
Genre: Horror, Mystery, Science Fiction Actors: Anthony Newley, Brown Derby, Dean Jagger, Edward Chapman, Edwin Richfield, Frazer Hines, Ian MacNaughton, Jameson Clark, Jane Aird, John Harvey, John Stone, Kenneth Cope, Leo McKern, Marianne Brauns, Michael Brooke, Michael Ripper, Neil Hallett, Neil Wilson, Norman Macowan, Peter Hammond, Robert Bruce, William Lucas Directors: Joseph Losey, Leslie Norman
