Cathal O'HallinActingCathal O'Hallin is known for his work on Vikings (2013), The Hole in the Ground (2019) and Desmond (2016).Known For8.1Vikings2013Desmond2016Fan ClubNo Nerds have favorited Cathal O'Hallin yet — be the first.All fan clubsFrom NerdspinFilmographyActor22016DesmondFilmNathan2013VikingsTVHvitserk • 13 episodes★ 8.1
