This upcoming Tuesday will be the final airdate of a brand new Season 12 episode of NCIS, in which the team will continue on the cyber terrorist recruitment arc.

'NCIS' Kills Off Recurring Character Ned Dorneget & Fans React On Twitter

During this Tuesday's episode, The Lost Boys, a recurring character, Special Agent Ned Dorneget (Matt Jones) was killed off in a terrorist attack in Cairo, Egypt.

In that episode, a young boy by the name of Luke Harris (Daniel Zolghadri) was brought into the storyline as a possible recruitment for the terrorist group The Calling, but that's not how things played out in the end.

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

In the season finale, Neverland, the team will be working tirelessly to bring justice to their fallen friend and coworker. They will be emotionally rocked, but won't stop.

In the preview, which the NCIS YouTube channel uploaded Thursday, Gibbs (Mark Harmon) appears to be totally lost as he talks to Dorneget's corpse. Check it out below.

In Tuesday night's episode when Dorneget's body was returned home, Gibbs imagined seeing him as well as other fallen friends and coworkers over the years. That will continue into the season finale.

Mike Franks (Muse Watson), who is amongst the dead Gibbs envisions, will say to Gibbs in the morgue, "How many have you saved? Who's going to save you?"

Luke will also appear in the finale. He is seen telling Gibbs, "People are dead because of me."

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

Tags: NCIS television CBS