Emilia Fox Dr. Nikki Alexander Actor William Gaminara Professor Leo Dalton Actor Tom Ward Dr. Harry Cunningham Actor William Armstrong Actor Sam Parks Actor Ruth McCabe Actor Ruth Gemmell Actor Jaye Griffiths Actor John McGlynn Actor Clare Higgins Actor Janice Acquah Actor Matthew Steer Actor Richard Huw Actor Nicola Redmond Actor Milo Twomey Actor Doreen Hepburn Actor Mick Ford Actor Chris Wilson Actor Ian Keith Actor Richard Signy Director Renny Rye Director Michael Crompton Writer Nigel McCrery Writer Laura Mackie Executive Producer Jessica Pope Executive Producer Tony McHale Writer Stephen Davis Writer Greg Dinner Writer Bruce Goodison Director Christian Spurrier Writer Maurice Phillips Director Hilary Salmon Executive Producer Brendan Maher Director Diarmuid Lawrence Director