Billy West Philip J. Fry / Dr. Zoidberg / Prof. Hubert J. Farnsworth (voice) Katey Sagal Turanga Leela (voice) John DiMaggio Bender (voice) Tress MacNeille Fanny / Michael's Wife / Boobs Vanderbilt / Dixie / Linda / Petunia / Ruth Ginsberg's Head / Mom (voice) Maurice LaMarche Kif Kroker (voice) Phil LaMarr Hermes Conrad (voice) Lauren Tom Amy Wong (voice) David Herman The Number 9 Man / Scruffy / Michael / Neputnian (voice) Dawnn Lewis LaBarbara Conrad / Womens' Prison Warden (voice) Snoop Dogg Snoop Dogg's Head (voice) Phil Hendrie Frida Waterfall / Hutch Waterfall / The Encyclopod (voice) Seth MacFarlane Mars Vegas Singer (singing voice) Penn Jillette Penn Jillette's Head (voice) Teller Teller's Head (credit only)