<Tr> <Th> Title </Th> <Td> M.D. </Td> </Tr> <Tr> <Th> Significant other (s) </Th> <Td> Megan Hunt Meredith Grey </Td> </Tr> <P> Nathan Riggs M.D., is a fictional character from the medical drama television series Grey's Anatomy, which airs on the American Broadcasting Company (ABC) in the United States . The character was created by series producer Shonda Rhimes and is portrayed by actor Martin Henderson . He was introduced in the episode "The Me Nobody Knows" as a cardiothoracic surgeon who had worked overseas with April Kepner during her time in Jordan . After bringing a patient to Grey - Sloan Memorial, he begins working there as an attending under Maggie Pierce . At the hospital, he begins a romantic relationship with Meredith Grey, now a widow after the death of Derek Shepherd, until his missing fiancée, Megan Hunt, is found and brought home . Nathan makes his last appearance in the episode "Danger Zone" when he and Megan start their life anew with her son in Los Angeles . </P> <P> Nathan Riggs is introduced in the sixth episode of the show's twelfth season as a new cardio attending at Grey - Sloan Memorial . It is quickly learned that he and Owen Hunt (Kevin McKidd) had been friends, but that their friendship ended acrimoniously . It is later revealed that Nathan and Owen's feud was caused by the disappearance of Owen's sister, Megan . Megan, who had been engaged to Nathan at the time of her abduction, had discovered Nathan's infidelity before running off and ultimately getting kidnapped . Owen has long blamed Riggs for the fate of his sister, who has been presumed dead for 10 years now . However, as time goes on, Nathan and Owen learn to work together and eventually tentatively reinstate their friendship . </P>

Who is dr riggs on grey's anatomy
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