<P> Scorpion is an American drama television series loosely based on the life of self - proclaimed genius and computer expert Walter O'Brien . The series follows Walter O'Brien and his team of genius outcasts as they are recruited by federal agent Cabe Gallo of the U.S. Department of Homeland Security to form Scorpion, said to be the last line of defense against complex, high - tech threats around the globe . </P> <P> On May 12, 2018, CBS cancelled the series after four seasons . During the course of the series, 93 episodes of Scorpion aired over four seasons . </P> <Table> <Tr> <Th_colspan="2"> Season </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="2"> Originally aired </Th> <Th_colspan="2"> Nielsen ratings </Th> </Tr> <Tr> <Th> First aired </Th> <Th> Last aired </Th> <Th> Rank </Th> <Th> Ave . viewership (in millions) </Th> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 22 </Td> <Td_colspan="1"> September 22, 2014 (2014 - 09 - 22) </Td> <Td> April 20, 2015 (2015 - 04 - 20) </Td> <Td> 15 </Td> <Td> 13.63 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 24 </Td> <Td_colspan="1"> September 21, 2015 (2015 - 09 - 21) </Td> <Td> April 25, 2016 (2016 - 04 - 25) </Td> <Td> 17 </Td> <Td> 12.05 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 25 </Td> <Td_colspan="1"> October 3, 2016 (2016 - 10 - 03) </Td> <Td> May 15, 2017 (2017 - 05 - 15) </Td> <Td> 22 </Td> <Td> 10.65 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 22 </Td> <Td_colspan="1"> September 25, 2017 (2017 - 09 - 25) </Td> <Td> April 16, 2018 (2018 - 04 - 16) </Td> <Td> 43 </Td> <Td> 8.38 </Td> </Tr> </Table>

When is the next episode of scorpion coming out
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