Guest Stars Bronagh Taggart as Gail McNally Valene Kane as Rose Stagg Emmett J. Scanlan as Glen Martin Richard Clements as Richard Turner Claire Rafferty as Christine Larkin Aisling Franciosi as Katie Benedetto Kelly Gough as Hagstrom Siobhán McSweeney as Mary McCurdy Jonjo O'Neill as Tom Stagg Tim Loane as Ged Green Pauline Hutton as Lisa Benedetto Dan Gordon as X-Ray 1 Orla Mullan as Control