<P> Person of Interest is an American science fiction crime drama television series created for CBS by Jonathan Nolan, who serves as an executive producer alongside J.J. Abrams, Bryan Burk, Chris Fisher, Greg Plageman, and Denise Thé . The series stars Jim Caviezel as John Reese, a former CIA agent who is presumed dead . He is approached by a mysterious billionaire named Harold Finch (Michael Emerson) who is trying to prevent violent crimes before they happen by using an advanced surveillance system dubbed "The Machine" that provides the SSN of a POI (person of interest) who will be involved in an imminent lethal crime as either a perpetrator or a victim . Their unique brand of vigilante justice attracts the attention of two NYPD officers, Joss Carter (Taraji P. Henson) and Lionel Fusco (Kevin Chapman), whom Reese uses to his advantage as he investigates the POI . Reese and Finch are later aided by Samantha "Root" Groves (Amy Acker), a highly intelligent computer hacker and contract killer whom the Machine later identifies as its "analog interface", and Sameen Shaw (Sarah Shahi), a former ISA assassin who unknowingly dealt with the "relevant" numbers found by the Machine . During the course of the series, 103 episodes of Person of Interest aired over five seasons . </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 22, 2011 (2011 - 09 - 22) </Td> <Td> May 17, 2012 (2012 - 05 - 17) </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 22 </Td> <Td_colspan="1"> September 27, 2012 (2012 - 09 - 27) </Td> <Td> May 9, 2013 (2013 - 05 - 09) </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 23 </Td> <Td_colspan="1"> September 24, 2013 (2013 - 09 - 24) </Td> <Td> May 13, 2014 (2014 - 05 - 13) </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 22 </Td> <Td_colspan="1"> September 23, 2014 (2014 - 09 - 23) </Td> <Td> May 5, 2015 (2015 - 05 - 05) </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 5 </Td> <Td_colspan="2"> 13 </Td> <Td_colspan="1"> May 3, 2016 (2016 - 05 - 03) </Td> <Td> June 21, 2016 (2016 - 06 - 21) </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Season </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="2"> Originally aired </Th> </Tr>

How many episodes in person of interest season 2