Ellie is plagued by numerous visions of a woman being tortured in the building's swimming pool, but professional swimmer and new resident Cass dismisses her warnings, leaving her at the mercy of what is lurking in the water. Meanwhile, Dan's interest in the former asylum seems to be not solely related to business when it emerges his blog undermines Warren's rebranding project.
Elenco: Charlotte Salt , Ashley Madekwe , Will Young , Sean Maguire , Lacey Turner , Gemma Chan .