The Risk Factor: Carver and Taviner follow Page and Knowles into a flat, where they find terrified tenant Billy Martin. Outside, they chase two masked men but lose them. Later, Taviner is water-bombed by kids, much to his colleagues' amusement. Later, Page and Knowles spot a man hanging around a local school, and Knowles gives chase, but sadly loses him. Page later identifies him as Dave Scoby, a registered sex offender. Knowles notices his address, and is concerned as he lives nearby to his sister and her daughters. Page makes it clear that no matter what his concerns are, he is not allowed to tell them. Knowles struggles to keep the information to himself, but unwisely confides in Taviner. (thetvdb.com)