• Cast members (L-R) Michael Weatherly, Pauley Perrette, Rocky Carroll, Mark Harmon, Cote de Pablo and David McCallum participate in a panel for CBS series NCIS during the CBS sessions at the Television Critics Association winter press tour in Pasadena, Cal

Cast members (L-R) Michael Weatherly, Pauley Perrette, Rocky Carroll, Mark Harmon, Cote de Pablo and David McCallum participate in a panel for CBS series NCIS during the CBS sessions at the Television Critics Association winter press tour in Pasadena, Cal (Photo : REUTERS/Phil McCarten )

"NCIS" Season 12 is only two episodes away from its finale. The CBS show airs Episode 23, which happens to be its penultimate segment on May 5, 2015.  The upcoming segment is titled "The Lost Boys" and will focus on mission to take down a terror group. Here are few spoilers for the next episode of "NCIS" Season 12. Read on to find out what happens next.

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[Spoiler alert! This article contains spoilers for "NCIS" Season 12 Episode 23 "The Lost Boys." Please do not read further if you don't want to know more about it.]

The story arc of Episode 22 will build up to the final two episodes of Season 12 of the show. The NCIS team continues the investigation of the cyber case that was assigned to the team in the last-aired segment. During their investigation, the team discovered the involvement of a terrorist group recruiting children to carry out terrorist activities around the world.

According to the official synopsis for Episode 23 (via Spoiler TV), the case turns into a "united global effort" as the terrorist group called "The Calling" becomes a global concern. This group uses internet to enroll children for the purpose of conducting acts of terrorism across the world. It seems they are preparing for a big mission as the team learns that the terrorist group has been buying S-bombs from the black market.

The network has released two promo videos teasing the events of "NCIS" Season 12 Episode 23 "The Lost Boys." The first trailer (via YouTube.com/ NCIS) shows Gibbs investigating at the scene of a bombing. Later, Gibbs notices a child looking at him. Gibbs runs after the child but he soon loses him.

In the second video (via YouTube.com/NCIS), the team reveals that they have evidence confirming Samar killed Wilt. They even discuss the information on the child Gibbs saw on the street. It is revealed that the kid was communicating with the terror group in a chat room called the Dark Web. Scroll down watch videos.

Meanwhile, fans can expect to see the return of Matt Jones as Special Agent Ned Dorneget. According to TV Line, Agah Bayar will also make a comeback in Episode 23. "NCIS" showrunner Gary Glasberg told the aforementioned website that Tamer Hassan's character will reappear in penultimate segment. He happens to be the arms dealer who has appeared three times in the show already. "Agah Bayar has specific information" of an "unfortunate event," revealed Glasberg.

"NCIS" Season 12 Episode 23 "The Lost Boys" airs May 5, 2015 at 8:00 pm on CBS. Stay tuned for more spoilers.