The Rookie

ABC | 10:00 pm

Seamus Dever and Jon Huertas, who played Detectives Ryan and Esposito on Nathan Fillion's mystery series "Castle," guest star in the new episode "The Bet," which sees Nolan (Fillion) navigating some shifting dynamics with Jessica and Grace (Sarah Shahi, Ali Larter) while working a high-stakes case involving an undercover Homeland Security agent. Elsewhere, Officer Lopez (Alyssa Diaz) learns a surprising bit of information about Wesley (Shawn Ashmore). Melissa O'Neil and Eric Winter also star.