Judge Reinhold as Louie

Clint Howard as Stu

Lou Ferrigno as Dogcatcher

Brooke Winn as Haley Jeffries

Megan Austin Oberle as Lucretia

Eric Kushnick as Drac

Steve White as Special Agent Bruce Mechanic

Michelle Mar as Special Agent Ellen Miser

Brian Donovan as Ping! (voice)

Shirley Jones as Ethel Jeffries

Steve Susskind as Thor (voice)

Loren Lester as Damien (voice)

Torie Lynch as Tracy

Jason Lanc as Steven

Ted Garcia as T.V. Reporter #1

Tammy Coburn as T.V. Reporter #2

Edie Mirman as Cat #1 (voice)

Lucy Lin as Cat #2 (voice)

Rance Howard as Old Man