<Li> Mom (Tress MacNeille)--Mom is the malevolent, foul - mouthed, cruel, and narcissistic owner of MomCorp, the thirty - first century's largest shipping and manufacturing company, with a monopoly on robots . In public, she maintains the image of a sweet, kindly old woman by speaking in stereotypically antiquated statements and wearing a mechanical fat suit . She occasionally launches insidious plans for world domination and corporate takeover . She has a romantic history with the Professor which left her bitter and resentful . She has three bumbling sons, Walt, Larry, and Igner (modeled after The Three Stooges), who do her bidding despite frequent abuse, and often infuriate her with their incompetence . In Bender's Game, it is revealed that Igner's father is Professor Farnsworth . </Li> <Li> Nibbler (Frank Welker)--Nibbler is Leela's pet Nibblonian, whom she rescues from an imploding planet and adopts in the episode "Love's Labours Lost in Space". Despite his deceptively cute exterior, Nibbler is actually a highly intelligent super-being whose race is responsible for maintaining order in the universe . He is revealed in "The Why of Fry" to have been directly responsible for Fry's cryogenic freezing . While the size of an average house cat, his race is capable of devouring much larger animals . He defecates dark matter, which until Bender's Game is used as fuel for space cruisers in the series . </Li> <Table> <Tr> <Th_colspan="2"> Season </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="3"> Originally aired </Th> </Tr> <Tr> <Th> First aired </Th> <Th> Last aired </Th> <Th> Network </Th> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 13 </Td> <Td_colspan="1"> March 28, 1999 (1999 - 03 - 28) </Td> <Td> November 14, 1999 (1999 - 11 - 14) </Td> <Td> Fox </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 19 </Td> <Td_colspan="1"> November 21, 1999 (1999 - 11 - 21) </Td> <Td> December 3, 2000 (2000 - 12 - 03) </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 22 </Td> <Td_colspan="1"> January 21, 2001 (2001 - 01 - 21) </Td> <Td> December 8, 2002 (2002 - 12 - 08) </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 18 </Td> <Td_colspan="1"> February 10, 2002 (2002 - 02 - 10) </Td> <Td> August 10, 2003 (2003 - 08 - 10) </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 5 </Td> <Td_colspan="2"> 16 </Td> <Td_colspan="1"> March 23, 2008 (2008 - 03 - 23) </Td> <Td> August 30, 2009 (2009 - 08 - 30) </Td> <Td> Comedy Central </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 6 </Td> <Td_colspan="1"> 26 </Td> <Td> 13 </Td> <Td_colspan="1"> June 24, 2010 (2010 - 06 - 24) </Td> <Td> November 21, 2010 (2010 - 11 - 21) </Td> </Tr> <Tr> <Td> </Td> <Td> 13 </Td> <Td_colspan="1"> June 23, 2011 (2011 - 06 - 23) </Td> <Td> September 8, 2011 (2011 - 09 - 08) </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 7 </Td> <Td_colspan="1"> 26 </Td> <Td> 13 </Td> <Td_colspan="1"> June 20, 2012 (2012 - 06 - 20) </Td> <Td> August 29, 2012 (2012 - 08 - 29) </Td> </Tr> <Tr> <Td> </Td> <Td> 13 </Td> <Td_colspan="1"> June 19, 2013 (2013 - 06 - 19) </Td> <Td> September 4, 2013 (2013 - 09 - 04) </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Season </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="3"> Originally aired </Th> </Tr>

When did the last episode of futurama air