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