Overview: To impress a beautiful girl, Harold Kelp, the grandson of professor Julius Kelp, who created a potion to transform his personality, gets his hands on his grandfather's secret elixir and unleashes his destructive alter ego, Jack.
Watch Trailer
Release: Jan 01, 1970Runtime: Revenue - minutesQuality: HDIMDb: / 10 by usersPopularity: Budget: $Revenue: $Language: