Four explorers are summoned to Peru by the brilliant physicist Dr Thorkel. They discover a rich source of radium and a half-mad Thorkel who shrinks them down to one-fifth their normal size when they ...

In Dr. Cyclops, a mad scientist invents a formula which he uses to shrink people down against their will, a premise that would become extremely common in these movies. In this case, he invites a bunch ...

Deep in the jungle, a scientist welcomes a group of colleagues. When they discover he's been shrinking animals, they find themselves endangered and are miniaturised as well. The real struggle for ...