<P> Blindspot is an American crime drama television series created by Martin Gero, starring Sullivan Stapleton and Jaimie Alexander . The series was ordered by NBC on May 1, 2015, and premiered on September 21, 2015 . A back nine order was given on October 9, 2015, bringing the first season to a total of 22 episodes, plus an additional episode bringing the order to 23 episodes . </P> <P> On May 10, 2017, NBC renewed the series for a third season, which is set to premiere on October 27, 2017 . As of May 17, 2017, 45 episodes of Blindspot have aired, concluding the second season . </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"> 23 </Td> <Td_colspan="1"> September 21, 2015 (2015 - 09 - 21) </Td> <Td> May 23, 2016 (2016 - 05 - 23) </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 22 </Td> <Td_colspan="1"> September 14, 2016 (2016 - 09 - 14) </Td> <Td> May 17, 2017 (2017 - 05 - 17) </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> TBA </Td> <Td_colspan="1"> October 27, 2017 (2017 - 10 - 27) </Td> <Td> TBA </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Season </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="2"> Originally aired </Th> </Tr>

How many seasons of blindspot have there been
find me the text answering this question