French nuclear tests irradiate an iguana into a giant monster that heads off to New York City. The American military must chase the monster across the city to stop it before it reproduces.

French nuclear tests irradiate an iguana into a giant monster that viciously attacks freighter ships in the Pacific Ocean. A team of experts, including Niko Tatopoulos, conclude that the oversized reptile is the culprit. Before long, the giant lizard is loose in Manhattan as the US military races to destroy the monster before it reproduces and it's spawn takes over the world.

Suburban America gone haywire. In the midst of a serial abductor/killer's rampage, a beautiful young teen, Riley Lawson, goes missing. When her desperate parents, Will and Kate, are contacted by her kidnapper, an insufferable FBI Special Agent takes charge of the case.But, from deep within the psychopathic subterranean world created by Otis, Riley turns the tables on her tormentor, manages to escape and to contact her parents. And, fed up with the tragi-comic inability of the FBI to find their girl, Will, Kate, and Riley's brother, Reed decide to take matters - and justice - into their own hands.

A giant, reptilian monster surfaces, leaving destruction in its wake as it strides into New York City. To stop it, an earthworm scientist, his reporter ex-girlfriend, and other unlikely heroes team up to save their city.

In the future, an alien race uses androids as bombs to attack Earth. A government weapons specialist is accused of being one such android and sets out to prove his innocence.