As Hathaway questions Clare over Vicki's allegation that he wanted to involve Reuben in military trials - which he denies - Lewis discovers that the victims were killed with equine drugs stolen from a stable where Justine Skinner worked. On arriving at Justine's house the police find she has been beaten up by Frank McLean,who claims that she tried to frame him for Reuben's murder. Lewis also discovers that Polly's mother Jane had visited Reuben on the day of his slaying. Jane admits this,saying that she thought Reuben was being unfaithful and she wanted to buy him off but says that she left him alive. Ultimately Lewis comes to see that the killer was nothing to do with the psychic world but was involved in the murdered pair's sleep deprivation interviews.