Jordan and Lu investigate the suicide of a teen, whose note indicated that he'd been molested; Woody looks into the gruesome death of a woman who was hit by several cars on a highway; Macy warns Jordan that she needs to do things by the book when an investigator starts poking around the office; and Lily receives some surprising news.

Josh Duhamel and Molly Sims guest star as their Las Vegas characters, Danny McCoy and Delinda Deline, whose Boston vacation turns into a crime-busting mission when they help Jordan and Woody investigate the murder of a boxing champ. Meanwhile, Bug works on the case of a woman who was found in the Charles River---and had been there since the 1980s. And a pregnant Lily returns to work and reveals the identity of the baby's father.