<P> The series covers the actions of a small special state task force created by the Governor of Hawaii, Pat Jameson, to investigate serious crimes throughout the Islands, as Hawaii does not have a conventional state police force . The team is headed by Lieutenant Commander Steve McGarrett, USNR (and former Navy SEAL) as it investigates crimes ranging from terrorism to kidnapping . McGarrett chooses as his partner Honolulu PD (and former Newark PD) Detective Danny Williams . He completes the team by selecting Chin Ho Kelly, and Chin's cousin, a rookie HPD officer named Kono Kalakaua who is fresh from the academy . The task force does not follow the normal chain of command, and instead reports directly to the Governor's office . However, in season two, after Gov. Jameson is murdered, the new governor, Sam Denning, does not give them complete immunity . On March 25, 2016, the series was renewed for a seventh season, which premiered on September 23, 2016 . On March 23, 2017, CBS renewed the series for an eighth season, which premiered on September 29, 2017 and is expected to conclude on May 18, 2018 . On April 18, 2018, CBS renewed the series for a ninth season . </P> <P> As of May 18, 2018, 193 episodes of Hawaii Five - 0 have aired, concluding the eighth season . </P> <Table> <Tr> <Th_colspan="2"> Season </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="2"> Originally aired </Th> <Th_colspan="4"> Nielsen ratings </Th> </Tr> <Tr> <Th> First aired </Th> <Th> Last aired </Th> <Th> Rank </Th> <Th> Viewers (in millions) </Th> <Th> Rating </Th> <Th> Tied with </Th> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 24 </Td> <Td_colspan="1"> September 20, 2010 (2010 - 09 - 20) </Td> <Td> May 16, 2011 (2011 - 05 - 16) </Td> <Td> 22 </Td> <Td> 11.26 </Td> <Td> 7.5 </Td> <Td> The Voice Desperate Housewives Grey's Anatomy </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 23 </Td> <Td_colspan="1"> September 19, 2011 (2011 - 09 - 19) </Td> <Td> May 14, 2012 (2012 - 05 - 14) </Td> <Td> 26 </Td> <Td> 11.83 </Td> <Td> 7.6 </Td> <Td> Grey's Anatomy </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 24 </Td> <Td_colspan="1"> September 24, 2012 (2012 - 09 - 24) </Td> <Td> May 20, 2013 (2013 - 05 - 20) </Td> <Td> 35 </Td> <Td> 10.36 </Td> <Td> 6.8 </Td> <Td> 2 Broke Girls </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 22 </Td> <Td_colspan="1"> September 27, 2013 (2013 - 09 - 27) </Td> <Td> May 9, 2014 (2014 - 05 - 09) </Td> <Td> 21 </Td> <Td> 11.66 </Td> <Td> 7.5 </Td> <Td> None </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 5 </Td> <Td_colspan="2"> 25 </Td> <Td_colspan="1"> September 26, 2014 (2014 - 09 - 26) </Td> <Td> May 8, 2015 (2015 - 05 - 08) </Td> <Td> 20 </Td> <Td> 12.28 </Td> <Td> 7.8 </Td> <Td> 60 Minutes Grey's Anatomy </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 6 </Td> <Td_colspan="2"> 25 </Td> <Td_colspan="1"> September 25, 2015 (2015 - 09 - 25) </Td> <Td> May 13, 2016 (2016 - 05 - 13) </Td> <Td> 25 </Td> <Td> 11.04 </Td> <Td> 7.0 </Td> <Td> Chicago Fire </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 7 </Td> <Td_colspan="2"> 25 </Td> <Td_colspan="1"> September 23, 2016 (2016 - 09 - 23) </Td> <Td> May 12, 2017 (2017 - 05 - 12) </Td> <Td> 15 </Td> <Td> 12.15 </Td> <Td> 7.6 </Td> <Td> The Voice </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 8 </Td> <Td_colspan="2"> 25 </Td> <Td_colspan="1"> September 29, 2017 (2017 - 09 - 29) </Td> <Td> May 18, 2018 (2018 - 05 - 18) </Td> <Td> 18 </Td> <Td> 11.00 </Td> <Td> TBA </Td> <Td> TBA </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Season </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="2"> Originally aired </Th> <Th_colspan="4"> Nielsen ratings </Th> </Tr>

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