Everything We Know About The Mole On NCIS: Los Angeles

NCIS: Los Angeles' ongoing mole storyline has been a thriller and pushed the Office of Special Projects to the brink. At the start of Season 8, Under Secretary of Defense Corbin Duggan (Jackson Hurst) launched a full-on investigation and held Hetty in D.C. for questioning after she admitted to being the mole.
 
She wasn't, of course, but the whole ordeal sparked even more questions about which insider could be out to destroy the Los Angeles branch of NCIS.
 
As the mole investigation continues, let's review everything we know about the situation so far.
 
Watch NCIS: Los Angeles on Sundays at 8/7c on CBS and CBS All Access.

There's a history of trouble in the City of Angels. Initially, it was a mole named Carl Brown (Adam Bartley) who worked for the team's IT department and was targeting Hetty.

In the Season 6 episode "Traitor," Brown poisoned Granger, causing the Assistant Director to flip his car.

In the same episode, Carl revealed himself to be the mole and took Eric hostage before he was apprehended by the team. (At the time, Eric was one of seven suspects.)

Back in Season 5, Sam had killed Tyler Brunson (Stephen Wozniak). As a follow-up, in the Season 7 episode "Command & Control," Tyler's brother Chad Brunson (Taylor Nichols) sought revenge against Sam, but he couldn't have known to target the special agent without inside help.

Chad died before revealing his source, leaving the team to wonder if the leak was Carl—or a second mole.

Concerned with the latest leak, Hetty planned to interrogate Paul Angelo, a dirty, former NCIS agent who had given the team up to Tyler Brunson. Angelo appeared in the Season 5 episode "Three Hearts."

Hetty made it clear she didn't want anybody's help with the interrogation.

When Sam's family was threatened in the Season 7 episode "Revenge Deferred," the timeline made it clear that the team was dealing with a second mole who remained active after Carl was stopped.
 
As it happens, the information about Sam's family was leaked to Tahir Khaled (Anslem Richardson), the terrorist network leader and brother of Jada Khaled (Ella Thomas).

Tahir was captured but didn't give up the mole's identity, and he eventually escaped. There was also speculation as to whether Jada would have known how her brother got the information.

In the same episode, as the team investigated everybody who started working at the Office of Special Operations around the same time as Carl Brown, Hetty warned Granger, "Until we find this mole, it's open season on the lives of everyone under this roof. Including you and me."

In the Season 7 episode "Where There's Smoke," Hetty suggested to Granger that she blames herself for the mole.

In the episode "Sirens," Sam, Callen, Deeks, and Hetty tracked down a contact of Carl's named Natalie Grant. Unfortunately, Natalie was gunned down before she could be taken in for questioning, but she did reveal the name of her employer: Rae, a.k.a. "Heather," the woman Granger spoke to at the bar in the Season 8 premiere.

The mole went on the offense in the episode "Hot Water" (the first in a three-parter focused on the mole storyline), as planted evidence resulted in the arrests of Callen, Sam, Granger and Deeks—all detained by different agencies.

In part two of the mole-centric three-parter, the mole—or moles, as it were—reveal themselves to be a group of rogue CIA agents. They include CIA Officers Vostanik Sabatino (Erik Palladino), Randall Sharov (Salvator Xuereb), and Kensi's friend from rehab, Sullivan, a.k.a. CIA Officer Ferris.

The intrigue continues!

Watch NCIS: Los Angeles on Sundays at 8/7c on CBS and CBS All Access.