<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"> April 3 , 2011 ( 2011 - 04 - 03 ) </Td> <Td> June 19 , 2011 ( 2011 - 06 - 19 ) </Td> <Td> AMC </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 13 </Td> <Td colspan="1"> April 1 , 2012 ( 2012 - 04 - 01 ) </Td> <Td> June 17 , 2012 ( 2012 - 06 - 17 ) </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 12 </Td> <Td colspan="1"> June 2 , 2013 ( 2013 - 06 - 02 ) </Td> <Td> August 4 , 2013 ( 2013 - 08 - 04 ) </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 6 </Td> <Td colspan="2"> August 1 , 2014 ( 2014 - 08 - 01 ) </Td> <Td> Netflix </Td> </Tr> </Table>
how many episodes of the killing on netflix
6