<P> Chicago P.D. is an American television drama on NBC spun off from Chicago Fire . The series focuses on a uniformed police patrol and the Intelligence Unit that pursues the perpetrators of the city's major street offenses . The series premiered on January 8, 2014 . On May 10, 2017, NBC renewed the series for a fifth season, which is set to premiere on September 27, 2017 . </P> <P> As of May 17, 2017, 84 episodes of Chicago P.D. have aired, concluding the fourth season . </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> Average viewers (million) </Th> </Tr> <Tr> <Td> </Td> <Td_colspan="3"> Pilot </Td> <Td_colspan="2"> May 15, 2013 (2013 - 05 - 15) </Td> <Td> N / A </Td> <Td> 6.90 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 15 </Td> <Td_colspan="1"> January 8, 2014 (2014 - 01 - 08) </Td> <Td> May 21, 2014 (2014 - 05 - 21) </Td> <Td> 55 </Td> <Td> 8.03 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 23 </Td> <Td_colspan="1"> September 24, 2014 (2014 - 09 - 24) </Td> <Td> May 20, 2015 (2015 - 05 - 20) </Td> <Td> 51 </Td> <Td> 8.74 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 23 </Td> <Td_colspan="1"> September 30, 2015 (2015 - 09 - 30) </Td> <Td> May 25, 2016 (2016 - 05 - 25) </Td> <Td> 47 </Td> <Td> 8.71 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 23 </Td> <Td_colspan="1"> September 21, 2016 (2016 - 09 - 21) </Td> <Td> May 17, 2017 (2017 - 05 - 17) </Td> <Td> 36 </Td> <Td> 8.48 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 5 </Td> <Td_colspan="2"> TBA </Td> <Td_colspan="1"> September 27, 2017 (2017 - 09 - 27) </Td> <Td> TBA </Td> <Td> TBA </Td> <Td> TBA </Td> </Tr> </Table>

What is the current season of chicago pd