Fans of the police procedural drama, 'NCIS: Los Angeles', got the chance to catch some spoilers for the upcoming episode as CBS recently released some images hinting at what's in store for the viewers.

In the spoiler pictures, Special Agents G. Callen (Chris O'Donnell), Sam Hanna (LL Cool J), Kensi Blye (Daniela Ruah) and LAPD Detective Marty Deeks (Eric Christian Olsen) can be seen caught up in some action.

One of the spoiler images even showcases Callen in a situation where it seems as though the terrorists are taking over.

The official synopsis for the Episode 12 reads: "While Callen is undercover in the mailroom of an office building to investigate an arms dealer, it is going to get overtaken by terrorists and Callen will become a hostage. When the team arrives to help, they are going to discover the entire building is wired with explosives. "

The twelfth episode of the seventh season of 'NCIS: Los Angeles' will be called "Spiral" and is scheduled to air on Jan. 5, 2015, Monday, at 9 pm on CBS

Meanwhile, "Humbug," the eleventh episode of the hit series was aired on December 15, under the helm of director Tony Wharmby.

That episode was about Callen's girlfriend, Joelle, who stood as a major witness to a cyber crime that the team is investigating, involving a stolen malware on a flash drive.

In an attempt to protect Joelle, Callen had to blow his cover, which came as a shock to his girlfriend, but she was willing to start over.

Deeks and Kensi, on the other hand, were on a ski trip together and they finally kissed and decided on taking their relationship to the next level where there will be "no more games."

As for NCIS Intelligence Analyst Nell Jones (Renee Felice Smith), she spent her time watching holiday themed films with Tech Operator Eric Beale (Barrett Foa), while Sam was surprised by his wife and son, who is now a cadet sergeant.