Anna Kolcheck (Bar Paly) is returning in the upcoming NCIS: Los Angeles season 12 episode 12. The character hasn't been seen in the police procedural for the past few episodes and her whereabouts remain unknown. In fact, G. Callen (Chris O'Donnell) is trying to track her location.

Now, it has been confirmed that Anna is appearing in NCIS: Los Angeles season 12 episode 12, which comes with the title "Can't Take My Eyes Off You." Callen comes face to face with her while he's searching for the person tailing him in a remote area teeming with Russian.

It's yet to be seen whether or not Anna has a connection with the case. But then, it's clear that she and Callen have a lot of things to talk about. The two have been through a lot already, but there are still questions surrounding their current romantic relationship.

Over the past few episodes, Anna's location is unknown. This prompted Callen to go on a mission to find her and look for answers. Things between them might get clearer now that they're about to reunite in NCIS: Los Angeles season 12 episode 12.

Callen has been struggling to propose to Anna. He wants to marry his girlfriend but couldn't find the courage to ask the question. Her father, Arkady Kolcheck (Vyto Ruginis), didn't give him his blessing, as well. Despite that, he still proposed to her but she suddenly disappeared.

But, aside from his love life, Callen will be facing another problem that could jeopardize his job. He was detained and accused of being a Russian double agent. One more episode is set to air before NCIS: Los Angeles season 12 episode 12, and it'll see the special agent in a complicated situation.

In the promo of episode 11, "Russia, Russia, Russia," Callen was accused of working for the Russians. However, there is speculation that he'll betray the whole team after fans spotted clues. He decided to turn himself in and Marty Deeks (Eric Christian Olsen) can be heard saying they're in jeopardy.

Some were convinced that he's been deceiving the team from the beginning. If Callen is, indeed, a double agent and working for the Russians, he may have to abandon the entire team. It can be noted that he's the son of a Russian KGB agent and his part of his past could haunt him now.

NCIS: Los Angeles season 12 episode 12 airs on Sunday, Feb, 28, on CBS.