Dr. Cyclops (1940)

Dr. Thorkel, a genius physicist, calls upon four daring adventurers to join him in Peru. Little do they know, they will uncover a valuable radium deposit during their expedition. However, things take a turn for the worse when Thorkel's sanity starts to slip and he decides to shrink the explorers down to a fraction of their original size. Desperate to escape his twisted experiments, the tiny explorers must band together and find a way to reverse the effects before it's too late. Will they be able to outsmart Thorkel and return to their normal size, or will they be forever trapped in a miniature world of madness?