The U.S. has handed over control of its nuclear defense system to the Colossus supercomputer designed by scientist Dr. Charles Forbin. It soon becomes clear, that the now-sentient Colossus is far more intelligent than its creator realized—with the fate of the world hanging in the balance.

A teenage girl, overjoyed when her uncle comes to visit the family in their quiet California town, slowly begins to suspect that he is the "Merry Widow" killer sought by the authorities.

Ex-soldiers on a yachting trip run into the ghosts of victims of a massacre.

A woman has nightmares of being buried alive which somehow awakens a long-repressed enity inside her while her greedy, cheating husband plots to murder her for her money.

When a man-eating cave creature appears with a fortune in uncut diamonds around his neck, Dr. Chambers' daughter Denae hires adventurers C & C Salvage to find the underground source of the gems. Accompanied by archeaological intern Andrew Paris, mineralogist Prof. Strock, and C&C's scruffy owners Cort Eastman and Eddy Colchilde, Denea's hopes of emerging from her famous father's shadow become as remote as getting out of the caves alive!

A horror movie star returns to his famous role after years in a mental institution. But the character seems to be committing murders independent of his will.