After Judd shows Cassie to her room, Briggs and Locke leave and promise to return the next day for training. Cassie inspects the half-filled closet and profiles her absent roommate from the clothes: bright patterns, black and white, no gray, and only flats. Cassie unpacks quickly, reflecting on her childhood spent moving from town to town with her mother.

Lia enters without waiting, wearing a softer outfit than before and seeming to have changed personalities along with clothes. Cassie notices the transformation and connects it to Lia’s talent for deception. Lia calls out Cassie’s attempt to lie about still unpacking, then offers a more useful tour than Judd’s and explains that the serial-killer portraits are better understood than ignored.

When Cassie asks where her roommate is, Lia leads Cassie to the basement. The space is huge and divided by high white partitions. As Cassie approaches, glass shatters somewhere out of sight, startling Cassie but not Lia.

Cassie meets Sloane, her roommate, who defines the word “normal” and then disappears behind a partition. Cassie discovers that the basement contains three-walled simulation sets resembling bathrooms, bedrooms, restaurants, outdoor scenes, and other potential crime scenes. Sloane is in a bathroom set studying the scatter pattern of broken glass and Post-it notes.

Sloane greets Cassie by stating facts about red hair and anesthesia, making Cassie realize Sloane is the Natural who specializes in numbers and probabilities. Lia confirms that Sloane is exceptionally gifted with numerical analysis, sometimes dangerously so. Michael arrives, jokes about hiding Sloane’s coffee, and gives Cassie the nickname “Colorado.”

Cassie asks whether the group consists only of Michael, Lia, Sloane, and herself. Michael’s expression darkens while Lia smiles, and Sloane cheerfully reveals that there is one more person in the house: Dean.