<Tr> <Th_colspan="2"> External links </Th> </Tr> <Tr> <Td_colspan="2"> Website </Td> </Tr> <P> Lethal Weapon is an American buddy cop action comedy - drama television series that is based on the film series of the same name created by Shane Black . The series was ordered on May 10, 2016 and premiered on Fox on September 21, 2016 . On October 12, 2016, Fox picked up the series for a full season of 18 episodes . On February 22, 2017, Fox renewed the series for a 22 - episode second season, which premiered on September 26, 2017 . </P> <P> Roger Murtaugh, an aging detective with a wife and three children, is partnered with Martin Riggs, a younger, somewhat unstable detective whose wife and unborn child were recently murdered . While Riggs' devil - may - care methods of collaring criminals puts his and Murtaugh's lives in danger on a regular basis, the two are able to develop a respect and friendship . </P>

When does season 2 of lethal weapon come out