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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.
as Harold Kelp/Jack Love
as Professor Julius Kelp / Buddy Love
as Robin
as Zeke/Waiter/Fear/Ned
as Begews
as Dean Von Wu
as Brad/Tad
as Polly
as Suzy Perkins
1964
2010
1987
2009
1999
2006
1990
2007
1983
2004
2002
1994
2010
