S1, E5: Cassie immerses herself in the art of being Lexie, the history of Whitethorn House and the backgrounds of the dead woman's housemates, who may or may not be murderers. Now alone, Rob makes costly mistakes and rapidly spirals. But in the depths of his despair, he remembers a fragment of his past that he is convinced is the key to everything. At Whitethorn House, the housemates — Daniel, Rafe, Justin and Abby — are told that Lexie is fragile but she is coming home to them. The four potential murderers stand on the steps of Whitethorn House, the grand house in Wicklow, watching the car approach. Cassie steps out, pale and thin, her stab wound dressed and healing, with a gun strapped to her leg.