Maurice LaMarche

Maurice LaMarche is the talented actor who gives voice to Calculon, Kif Kroker, Walt, and many other characters. He has done voice work for an incredible array of series, including the Brain on ', Egon Spengler in ', and Keith Lieb on . LaMarche was also the third person to voice in the history of the character. According to him, "Morbo, H. G. Blob, and Lrrr are not the same voice". Maurice is also well known for his impression of, which he has used on Futurama and other places including ', ' and The Simpsons. In 2011, LaMarche received a Primetime Emmy nomination for Outstanding Voice-Over Performance for his performances as Lrrr and Orson Welles' head in "Lrrreconcilable Ndndifferences".

Recurring characters

 * Calculon, star of All My Circuits
 * Kif Kroker, an officer of the Nimbus
 * Walt, one of Mom's three sons
 * Morbo, the Channel √2 News monster
 * Horrible Gelatinous Blob
 * Lrrr, ruler of the planet Omicron Persei 8
 * Donbot
 * Clamps
 * Destructor
 * The Scary Door narrator
 * Hedonism Bot
 * Dr. Perceptron
 * Raoul Inglis
 * Transition Announcer

One-time characters

 * Fishy Joseph Gilman in The Problem with Popplers
 * The Organ Dealer in Little Neptune
 * The Horny Scientist, Docuporn feature The Garbage Crisis of 2000
 * The croupier at Bender's craps table
 * The Neutral President
 * iHawk
 * The Robot Devil, when Dan Castellaneta was unavailable
 * The Mad Hatterbot
 * Patchcord Adams
 * Aracneon
 * The Osirian High Priest
 * The Πkea Robot
 * The Pain Monster
 * The Grumpy Snail, growling
 * Leelu (BBS)
 * Leroy (BBS)
 * Harold Zoid (TBWABB)
 * The Morcs (BG)
 * Leonardo da Vinci
 * Orson Welles' head
 * Erwin Schrödinger
 * The small rock alien
 * The Borax Kid (6ACV20)