NCIS: Los Angeles is ready to put Tahir down once and for all. The terrorist has threatened Sam long enough.

Agent Hanna (LL Cool J) incurred Tahir's (Anslem Richardson) wrath after his undercover mission with Jada sought to cripple his criminal empire, and, although Mr. Khalid's has failed to exact his revenge in the past, his quest for vengeance will continue in the finale. Instead of going after the entire Hanna clan, Tahir will focus his attention on Sam's son.

"A distress code from Sam's son, Aiden (Tye White), signals to the NCIS: LA team that Tahir, Sam's arch enemy, has taken over Aiden's military school in San Francisco, prompting Sam, Callen (Chris O'Donnell), Kensi (Daniela Ruah) and Deeks (Eric Christian Olsen) to rush north in hopes of apprehending Tahir and freeing the hostages," CBS teased.

Sam, of course, will stop at nothing to save his family. He can't keep his kids cooped up in a safe house forever. After all those years of keeping work and family safely compartmentalized, Sam's dangerous day job has caught up to him.

"Sam gets pushed to a point where he has to make a decision about whether to finish something once and for all and how he's going to do that," executive producer Scott Gemmill told TV Guide. "Obviously it's a very personal [episode] because it involves Sam and his son, and the return of Tahir, and Sam basically putting this threat to bed once and for all, and our team sort of rallying to make that happen."

Titled "Talion," the finale will air on May 2. In the meantime, Sam and Callen will go undercover as firefighters in "Where There's Smoke..."

Catch NCIS: LA Mondays at 10 p.m. ET on CBS. Click the video below to see a preview for the series' latest episode.

Tags: NCIS: LA NCIS: Los Angeles television CBS