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.

Top Cast

Dana AndrewsDr. Stephen Sorenson

Janette ScottDr. Maggie Sorenson

Kieron MooreDr. Ted Rampion

Alexander KnoxSir Charles Eggerston

Peter DamonJohn Masefield

Sydna ScottAngela

Gary LasdunMarkov

John KarlsenDr. Reynolds