The Obsession

Mason reveals that the killer has been stalking Naomi for a decade, identifying Eliza “Liza” Anderson as the first victim—a surrogate for Naomi in college. Resolving to actively help the investigation, Naomi delves into her files and photographs from that period. She discovers Xander on her deck assembling a new grill that he bought for her. He has also washed Tag.

Mason joins them, sharing the killer’s psychological profile. This triggers a memory for Naomi of a man watching her during a college photography trip to New Bedford, where another victim was later found. As she organizes her notes on timelines and potential connections, she and Xander discuss their deepening relationship. Mason gives Naomi a new set of years to research, and she resolves to continue her work, feeling a renewed sense of agency.

Naomi wakes from a nightmare about her father but vows not to live in fear. She and Xander attend the funeral for Donna, solidifying her place in the community. While they are out, the killer approaches the house, but his attempt to break in is thwarted when Tag begins to bark ferociously and charge at the doors. Enraged, the killer flees, vowing revenge on both Naomi and the dog.