Thank God it's Only a Motion Picture! Science miscalculates... underground Atom Bomb explodes earth's core... and the world totters on the brink of destruction! Today's terrifying look into what might happen tomorrow! Dr. Steven Sorenson (Andrews) plans to tap the geothermal energy of the Earth's interior by means of a thermonuclear device detonated deep within the Earth. Despite dire warnings by fellow scientist Ted Rampian (Moore), Dr Sorenson proceeds with the experiment after secretly learning that he is terminally ill. This experiment causes a crack to form and grow within the earth's crust, which threatens to split the earth in two if it is not stopped in time. Directed by Andrew Marton Writing credits (WGA) Jon Manchip White (story) Cast (in credits order)verified as complete Dana Andrews .... Dr. Stephen Sorenson Janette Scott .... Dr. Maggie Sorenson Kieron Moore .... Dr. Ted Rampion Alexander Knox .... Sir Charles Eggerston Peter Damon .... John Masefield Jim Gillen .... Rand Gary Lasdun .... Markov Alfred Brown Mike Steen .... Steele Emilio Carrere Sydna Scott .... Angela John Karlsen .... Dr. Reynolds Todd Martin .... Simpson Ben Tatar .... Indian ambassador Runtime: 96 min Country: USA Language: English Color: Color (Technicolor) Sound Mix: Mono (Westrex Recording System) Certification: Finland:K-12 soft print plain packaging