Police Detective Marino is skeptical about Liz's story, partly because of her profession, so Liz joins forces with Kate's revenge-minded teenaged son Peter to find the killer. Peter, an inventor, uses a series of homemade listening devices and time-lapse cameras to track patients leaving Elliott's office. They catch Bobbi on camera, and soon Liz is being stalked by a tall blonde in sunglasses. Several attempts are subsequently made on Liz's life. One, in the New York City Subway, is thwarted by Peter, who sprays Bobbi with homemade Mace.