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.
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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.
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Drake Bell , Jerry Lewis , Tabitha St. Germain
Paul Taylor
The Weinstein Company , Mainframe Entertainment
as Harold Kelp/Jack Love
as Professor Julius Kelp / Buddy Love