Juan Carlos Cantu

The BAU travels to Mexico to aid in the capture of a serial killer who has targeted elderly women.

Dexter finds himself in a strange new world when he attempts to hire a nanny for Harrison so he can continue to stalk and kill his next victim. Meanwhile, things heat up for Dexter when Quinn notices strange similarities between Trinity Killer suspect, ‘Kyle Butler’ and Dexter Morgan.

When a simple procedure goes awry, Elliot seeks advice from Dr. Kevin Casey (Michael J. Fox); Turk asks JD to be his best man at the wedding.

The NCIS team investigates a deadly car explosion in D.C. that connects to NCIS Special Agent Nicholas "Nick" Torres (Wilmer Valderrama), who disappeared six months ago while on a deep undercover assignment in Argentina. Also, Gibbs asks NCIS Special Agent Alexandra "Alex" Quinn (Jennifer Esposito) to shadow his team after rejecting eight agents she instructed and referred for the open position.

Sarah accompanies Kitty to Senator McAllister's hometown in preparation for his upcoming campaign, where they meet his high school sweetheart Alice, and attend a party with them.

Richard must make a difficult decision.