A famous scientist invents a humanoid robot (the titular "monster"), so a greedy rival scientist plans to steal it for use in his criminal plans. His henchmen often kidnap a trained gorilla (the titular "ape") from the zoo, to aid in the schemes.
as Ken Morgan
as Prof. Ernst
as Prof. Franklin Arnold
as Babs Arnold
as Flash
as Dick Nordik
as Joe Flint
as Joe Butler
as Blake
as Mead
as First Cop with Thor
as Police Inspector Hamilton
as Mason
as Thor
as Prof. Marsden
as Zoo Guard
