The season finale of NCIS airs tonight (May 12) at 8PM ET/PT on CBS.

Some preview images from the season finale can be found below.
NCIS
"Neverland" -- NCIS feverishly investigates a global terrorist group that is recruiting teens via the Internet following a deadly bombing overseas that results in an emotional and surprising loss for the team, on the 12th season finale of NCIS, Tuesday, May 12 (8:00-9:00 PM, ET/PT), on the CBS Television Network. Pictured: Sean Murray Photo: Sonja Flemming/CBS é2015 CBS Broadcasting, Inc. All Rights Reserved
NCIS stars Mark Harmon as NCIS Special Agent Leroy Jethro Gibbs, Michael Weatherly as NCIS Special Agent Anthony “Tony” DiNozzo, David McCallum as Dr. Donald “Ducky” Mallard, Pauley Perrette as Abby Sciuto, Sean Murray as NCIS Special Agent Timothy McGee, Rocky Carroll as NCIS Director Leon Vance, Brian Dietzen as Jimmy Palmer, and Emily Wickersham as Probationary NCIS Agent Eleanor “Ellie” Bishop.