NCIS airs its second to last episode of its twelfth season tonight, May 5, called The Lost Boys and below are two sneak peek clips!

Which Terrorist From An Earlier 'NCIS' Season 12 Episode Might Return For The Finale?

The team is working on an ongoing cyber terrorism case along with NCIS Cyber Operations Division's Special Agent Ned Dorneget (Matt Jones) that is a continuation from the previous episode called Troll.

In the first sneak peek clip; Tony DiNozzo (Michael Weatherly) and Gibbs (Mark Harmon) are at the exploded bus crime scene, which is where the previous episode left off.

'NCIS' Wraps Filming For Season 12, Cast Members Share Renewal For Season 13

Gibbs wants to get whoever put the horrendous thoughts into the teen's head, which led to the teen blowing himself up on the bus.

"Dorne's into it with Cyber," DiNozzo tells Gibbs about finding who told the teen to blow himself up on a bus.

Gibbs then consults Dr. Donald "Ducky" Mallard (David McCallum) about the teen's remains since he's not totally intact given the explosion. Plus, Ducky points out that the teen appears to have a tattoo of sorts that is familiar on his arm and then Gibbs notices a younger kid in the crowd at the crime scene and takes off after him when the kid takes off.

Unfortunately Gibbs loses sight of the kid.

In the other sneak peek clip, Eleanor "Ellie" Bishop (Emily Wickersham) is seen telling Gibbs what she found out about the mystery kid, who is named Luke, that he saw at the crime scene that they did seem to get a hold of after all.

DiNozzo and Bishop then reenact how Abby Sciuto (Pauley Perrette) would share her findings with Gibbs through a prepared script Abby printed for them to read to him.

Bishop reveals they need to get Luke to talk since he obviously knows how to contact the one in charge of the cyber terrorist recruitment strategy.

NCIS airs on Tuesdays at 8 p.m. ET on CBS.