Unlucky in love once more, Mickey thumps Heaton for sleeping with Mia and starts packing his bags – though Jack is determined to save his protégé's career, even if it means crossing swords with the Superintendent. Mickey later investigates the death of a young woman found drowned in a swimming pool. Meanwhile, Emma finally discovers the extent of her husband's psychological bullying when Will puts her in touch with Matt's ex Nina Lloyd. She finally fights back as Matt attacks her once more, but have her deadly actions cost her career?