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