Alicia Ziegler

The BAU works to capture a serial killer who has evaded capture by altering his appearance.

When a young couple decides to go skinny-dipping in a hot spring, their spontaneity is ruined when they find the remains of a skeleton in the mud. Brennan and Booth soon discover the skeleton is that of Tripp Goddard, a professional motorcycle racer who just won the Super Grand Prix. The team immediately suspects Danny Fitz, the runner-up in the race and Tripp's main rival, to be the murderer. But just when Brennan and Booth think they have it solved, a fiery motorcycle crash claims another victim, and the circumstances seem far from accidental. Meanwhile, Dr. Lance Sweets forces Brennan and Booth to join him on a double-date in an effort to encourage them to interact in a social setting, away from any of their cases.

Castle and Beckett investigate the death of an NYC councilman who was running for re-election; Castle's latest book hits the stands and his mother offers only negative reviews.

Rush gets a visit from a frail 75-year-old woman seeking justice for her dead son, the victim of a 1964 gay bashing incident. Nearing the end of her own life, the woman believes the police never aggressively pursued the case because of her embarrassment over her son's lifestyle as well as societal prejudices at the time.

The murder of a college student takes an odd turn when Jane and Maura discover he had 32 girlfriends. Uncovering who killed him and why leads them into a world of app developers, virtual boyfriends and relationships built on lies. Meanwhile, Korsak finally introduces everyone to the new woman in his life.