<Li> Clancy Brown as Waylon' Jock' Jeffcoat: Attorney General of the United States </Li> <Li> John Malkovich as Grigor Andolov: a Russian billionaire </Li> <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"> 12 </Td> <Td_colspan="1"> January 17, 2016 (2016 - 01 - 17) </Td> <Td> April 10, 2016 (2016 - 04 - 10) </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 12 </Td> <Td_colspan="1"> February 19, 2017 (2017 - 02 - 19) </Td> <Td> May 7, 2017 (2017 - 05 - 07) </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 12 </Td> <Td_colspan="1"> March 25, 2018 (2018 - 03 - 25) </Td> <Td> June 10, 2018 (2018 - 06 - 10) </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Season </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="2"> Originally aired </Th> </Tr>

How many episodes of billions are in season 3