Army Lieutenant Halliday, accused of stealing the Army payroll, pursues the real thief on a frantic chase through Mexico aided by the thief’s ex-girlfriend and is in turn being chased…

Volcanic activity frees giant scorpions from the earth who wreak havoc in the rural countryside and eventually threaten Mexico City.

In California, a Mexican-American laborer is falsely accused of shooting the racist farmer he was working for after the farmer stiffed him with a bad check.

An American cowboy living in Mexico discovers his cattle is being eaten by a giant prehistoric dinosaur.

At Rio Galdez’s remote Brazilian trading post live assorted outcast Americans and Europeans, including Jerry Russell, ex-engineer who became obsessed with the Jivaro headhunters’ treasure, quit his job, and took…