Gregg BergerThe Gromble (voice)

Charlie AdlerIckis (voice)

Christine CavanaughOblina (voice)

Jim BelushiSimon the Monster Hunter (voice)

Kath SoucieBlorp 2+4 / Woman (voice)

Lacey ChabertGirl (voice)

Michael DornBorl / Chauffer (voice)

Bronson PinchotDeitrich Dunlap (voice)

David EcclesKrumm (voice) / Snorch (voice)

Tim CurryZimbo (voice)

Shelley DuvallOcka (voice)

Beverly ArcherThe Library Monster (voice)

Edward WinterDr. Buzz Kutt (voice)

Billy VeraSlickis (voice)

Marcia StrassmanHarryette (voice)

Bill FagerbakkeCarl (voice)

Gábor CsupóCreator

Arlene KlaskyCreator

Peter GaffneyCreator