<P> This is a list of episodes in the American animated television series Ben 10: Ultimate Alien . </P> <Table> <Tr> <Th_colspan="2"> Season </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="2"> Originally aired </Th> </Tr> <Tr> <Th> First aired </Th> <Th> Last aired </Th> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 20 </Td> <Td_colspan="1"> April 23, 2010 (2010 - 04 - 23) </Td> <Td> December 10, 2010 (2010 - 12 - 10) </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 12 </Td> <Td_colspan="1"> February 4, 2011 (2011 - 02 - 04) </Td> <Td> April 29, 2011 (2011 - 04 - 29) </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 20 </Td> <Td_colspan="1"> September 16, 2011 (2011 - 09 - 16) </Td> <Td> March 31, 2012 (2012 - 03 - 31) </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="3"> Special </Td> <Td_colspan="2"> November 25, 2011 (2011 - 11 - 25) </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Season </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="2"> Originally aired </Th> </Tr>

How many episodes are there in ben 10 ultimate alien
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