Played by Edward MacLiam
17/02/2010 (S10 E20)
01/05/2012 (S14 E29)
Cardiothoracic Surgical Registrar
Greg is full of Irish charm, and he knows it. He’s worked hard to get where he is and believes the world is against him. He naturally rebels against authority but with his cheeky-chappy attitude he normally gets away with it.