as Russell
as Rod Stool(24 eps)
as Bobby Smith(1 ep)
as Grandpaw / Manhole Dog (voice)(74 eps)
as Balloon Vendor
as Older Felix
as Roy (voice)(103 eps)
as Byron Kane(1 ep)
as CC Glendale(1 ep)
as Gil/Manny (voice)
as Gil / Manny (voice)
as Gil / Manny (voice)(104 eps)
as Mr. Kerdle (voice)(4 eps)
as Judd Lumpkin
as Ratatosk / Bob / Additional Voices (voice)(52 eps)
as Frank Kanaskie(19 eps)
as Dr. Fraser Healy(13 eps)
as Nancy Siebolski(13 eps)
as Duke Peel (voice)(1 ep)
as Barry
as Ben
as Uncle EP Leacock
as Victor
as Dudley / Additional Voices(63 eps)
as Nestor (voice)(104 eps)
as Professor Pamplemoose (voice)(104 eps)
as Jim Fenton
as Two Legs Joe (voice)(52 eps)
as Robert (voice)(1 ep)
as Hank Kringle
as Harold Green
as Buddy (voice)(52 eps)
as Sam
as Additional Voices (voice)(26 eps)
as Detective Hamish Slorach(2 eps)
as Mr. Rutabaga(26 eps)
as Robear (voice)(52 eps)
as Rivet(26 eps)
as Lieber
as Dr. Julius Booker(1 ep)
as Louis Owen
as Milo 55160
as Dr. Gavin Brookes(1 ep)
as Charlie Cowell
as Harold Green
as Duncan
as Darren
as Harold Green
as Gary Hargrave
as Lab Technician
as Mr. Geiger(1 ep)
as Roger
as Supervisor
as Jay Felger(2 eps)
as Marty Stephens(83 eps)
as Dr. Seigel(1 ep)
as Gary Redfield(1 ep)
as Umberto Ortega
as Umberto Ortega(1 ep)
as TV Reporter
as Snyder(1 ep)
as Billy the Club Manager(2 eps)
as Harold Green(304 eps)
as TV Man
as Barry Berlin (uncredited)(1 ep)