Dr. Steven Sorenson plans to tap the geothermal energy of the Earth's interior by means of a thermonuclear device detonated deep within the Earth. 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.

• Security Pictures
• Paramount Pictures
• Dana Andrews
• Janette Scott
• Kieron Moore
• Alexander Knox
• Peter Damon
• Sydna Scott
• Gary Lasdun
• John Karlsen