Cass spends the next day gathering evidence of Matthew and Rachel’s schemes. She talks to Hannah about the barbecue invite, obtains a copy of the original security alarm contract (which has Matthew’s signature), and has the Baby Boutique clerk confirm that Rachel ordered the pram. More texts between Matthew and Rachel reveal that they didn’t initially intend for Cass to think the silent calls were from Jane’s killer; that was a lucky coincidence. In addition, they mention moving Cass’s car when she thought she lost it in the parking garage (and then moving it back) and forging the letter about early-onset dementia from Dr. Deakin. Cass talks to John, who explains that Rachel asked to meet him the previous day and urged him to tell Cass’s boss about her overdose. He tells Cass that Rachel isn’t a trustworthy friend. A strange feeling spurs Cass to drive along Blackwater Lane, where a breeze gives her the sense that Jane is with her. For the first time since Jane’s death, she feels peaceful.

When Cass returns home, she finds the large knife in the shed, where Rachel’s texts indicated she’d left it. Cass calls the police and says she found a knife that could be Jane’s murder weapon.