 Also in 2017, Cowell joined the cast of the HBO series "Game of Thrones" in Season 7 as Harrag, an Ironborn sea captain allied to Theon Greyjoy.In March 2019, it was announced that Brendan was selected to join the cast of the Avatar sequels as Mick Scoresby, captain of a large scale marine hunting vessel on Pandora.Brendan was born to parents Yvonne and Bruce 'Bruiser' Cowell.