First-time father Henry Spencer tries to survive his industrial environment, his angry girlfriend, and the unbearable screams of his newly born mutant child.

A highway patrol officer, two criminals, and a station secretary form an unlikely alliance to defend a defunct Los Angeles precinct against a siege by a bloodthirsty street gang.

Strange things begin to occur as a tiny California coastal town prepares to commemorate its centenary. Inanimate objects spring eerily to life; Rev. Malone stumbles upon a dark secret about the town's founding; radio announcer Stevie witnesses a mystical fire; and hitchhiker Elizabeth discovers the mutilated corpse of a fisherman. Then a mysterious iridescent fog descends upon the village, and more people start to die.

From deep within the tomb of the Egyptian pharaoh Tutankhamun, Professor Douglas McCadden ships the coffin of Ankh-Vanharis to the California Institute of Sciences where X-rays reveal five diamond-like crystals hidden within the coffin. Technician Peter Sharpe steals the crystals but doesn't notice that the powerful X-ray has revived a green fungus. When the coffin is opened at a university press conference, the reporters uncover more than they bargained for. The mummy has disappeared... and the Time Walker is alive again!

A herpetologist investigating a series of fatal rattlesnake attacks discovers that the creatures have been infected by a mysterious nerve gas disposed of in the desert by the military.