as Judd Lumpkin
as Umberto Ortega
as TV Man
as Joe Lieber
as Gil/Manny (voice)
as Russell
as Duncan
as Gary Hargrave
as Milo 55160
as Hank Kringle
as Supervisor
as Gil / Manny (voice)
as Harold Green
as TV Reporter
as Lab Technician
as Ben
as Balloon Vendor
as Victor
as Darren
as Louis Owen
as Older Felix
as Roger
as Jim Fenton
as Sam
as Jay Felger
as Detective Hamish Slorach
as Snyder
as Duke Peel (voice)
as Gary Redfield
as Buddy (voice)
as Dr. Julius Booker
as Marty Stephens
as CC Glendale
as Byron Kane
as Two Legs Joe (voice)
as Additional Voices (voice)
as Roy (voice)
as Frank Kanaskie
as Dr. Seigel
as Grandpaw / Manhole Dog (voice)
as Robear (voice)
as Dr. Gavin Brookes
as Professor Pamplemoose (voice)
as Nestor (voice)
as Dr. Fraser Healy
as Nancy Siebolski
as Mr. Kerdle (voice)
as Rod Stool
as Barry Berlin (uncredited)
as Rivet
as Billy the Club Manager
as Robert (voice)
