Part 1Aired on Apr 10, 2016
Dr. Gemma Foster (Suranne Jones), a loving wife, mother and trusted doctor whose seemingly perfect world is shattered when she suspects her husband Simon (Bertie Carvel) is having an affair. As the lies and betrayal come to light, she finds herself behaving in ways she could never have imagined.
Part 3Aired on Apr 24, 2016
Having been pushed to the brink, Gemma plans to reveal all Simon’s betrayals in the most explosive way possible. But will everything go according to her careful scheme–or will she be pushed to even more extreme lengths for her final act of revenge?