Donald Murphy as Oliver Frank(enstein)

Sandra Knight as Trudy Morton

John Ashley as Johnny Bruder

Felix Locher as Prof. Carter Morton

Wolfe Barzell as Elsu

Harry Wilson as The Monster

Sally Todd as Suzie Lawler

Harold Lloyd Jr. as Don

John Zaremba as Police Lt. Boyle

Robert Dix as Police Det. Bill Dillon

Charlotte Portney as Hysterical Woman

Voltaire Perkins as Mr. Rockwell

Bill Coontz as Loading Dock Foreman

George Barrows as Loading Dock Worker Mack