Jason O'Mara (born 6 August 1972) is an Irish and American actor. He has starred in American television series Terra Nova (2011), Vegas (2012–13), Agents of S.H.I.E.L.D. (2016–17) and The Man in the High Castle (2018–19). For his performance in The Siege of Jadotville (2016), he won an Irish Film & Television Award for Best Supporting Actor.