Fletch and Sacha race against the clock, even calling on some familiar faces for help in Jac's hour of need. Hanssen is determined to bury Gaskell's legacy but is forced to unlock its final secret. Donna is driven to make sense of her relationship with Xavier when he takes his personal pressures out on Jason.

A much-loved face from the past forces a guilty Serena to think about her future. Will she be able to keep her terrible secret? Dom and Lofty find themselves at a crossroads when a game highlights the cracks in their relationship. When Frieda and a difficult patient reach a place of understanding, she finds herself taking in an unlikely companion.