Kadro (20)
Richard Steven HorvitzZim (voice)
Andy BermanDib (voice)
Rosearik Rikki SimonsGIR (voice)
Melissa FahnGaz (voice)
Lucille BlissMs. Bitters (voice)
Rodger BumpassProfessor Membrane (voice)
Kevin McDonaldAlmighty Tallest Purple (voice)
R. Lee Ermey
Eliza Schneider
S. Scott Bullock
Sherman HowardOog-Oh (voice)
Dwight Schultz
Greg Ellis
Danny Cooksey
Olivia D'Abo
Philece SamplerScientist #4 / Germ Woman / Tiny Germ Voice (voice)
Mo Collins
Wally Wingert
Candi MiloMrs. Buggy / Giganto Baby (voice)
Dee Bradley BakerSanta Gerg / Guy in Crowd #1 / Cutest Little Kid (voice)