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.

The career of Revolutionary War naval hero John Paul Jones, from his youth in Scotland through his service to Catherine the Great of Russia.

When a princess is shrunken by an evil wizard, Sinbad must undertake a quest to an island of monsters to cure her and prevent a war.

A wealthy, self-absorbed Rome socialite is racked by guilt over the death of her young son. As a way of dealing with her grief and finding meaning in her life, she decides to devote her time and money to the city’s poor and sick. Her newfound, single-minded activism leads to conflicts with her husband and questions about her sanity.

After fierce Roman commander Marcus Vinicius becomes infatuated with beautiful Christian hostage Lygia, he begins to question the tyrannical leadership of the despotic emperor Nero.