Episode 2 (E02)

Despite Rob’s promise to Cassie that they won’t investigate Katy’s murder because of his past relationship with Knocknaree, he convinces her that they are the best people to solve the case because of his inside knowledge of the estate. Rob discovers that Jonathan, Katy’s father, was questioned as part of Peter and Jamie’s disappearance two decades ago, and Rosalind Devlin, Katy’s preternaturally mature older sister, seeks out Rob as the more empathetic of the two detectives. Rob has the gnawing feeling that Rosalind is hiding something brutal about her family. But in this world, ghosts refuse to stay dead, and by the end of the episode it is not just Rob wrestling with the past. (BBC)