We all know that two wrongs don’t make a right. So when geothermal scientist Stephen Sorenson (Dana Andrews) figures that deep-mining magma in the earth’s core which resulted in a fissure in the earth can be remedied – with a nuclear device! you know you’re in for an epic disaster. His colleague Ted Rampion (Kieron Moore) can’t dissuade him from this mega end of days move and their quarrel is emphasised by the woman they have in common Maggie (Janette Scott). She was involved with Ted before she married Stephen, who is concealing the fact that he’s about to die. That gives her desire to have his child an edge to this cracking drama when the two guys knock their very cerebral heads together about what to do. Very impressive staging, shooting and effects lend this tightly constructed doomsday scenario a lot of believability and style. Spain stands in for Tanganyika in a screenplay by Jon Manchip White and Julian Zimet. Directed by Andrew Marton.