Spector is rushed to Belfast General Hospital where Dr Joe O鈥橠onnell (Richard Coyle), Nurse Kiera Sheridan (Aisling Bea) and the staff engage in the blood-soaked fight to keep him alive.
News of Spector鈥檚 arrest and life-threatening injuries reach Katie and she plots to help him. With the powers-that-be questioning Gibson鈥檚 handling of the case, her determination to get a conviction is tested to the full.
Confirmed for BBC Two on 29 September at 9pm to 10pm