Ep 23. Kolcheck, A.

In NCIS: Los Angeles season 6 episode 23, titled "Kolcheck, A.", the team is tasked with investigating the disappearance of Arkady Kolcheck, a Russian informant/professional poker player who also happens to be the father of their colleague, Anatoli "Nate" Getz.

As they delve into the case, they discover that Arkady was at the center of a high-stakes gambling operation and that his sudden disappearance could be linked to a powerful and dangerous criminal organization.

Nate, who has been estranged from his father for many years, is initially hesitant to get involved in the case, but his emotional involvement leads him to join the team on their mission to find Arkady.

As they follow the trail of clues, the team encounters a number of twists and surprises that threaten to throw them off course. They must use all of their skills and resources to untangle the complex web of secrets and lies surrounding Arkady's disappearance and bring him home safely.

Along the way, there are plenty of action-packed moments, tense confrontations, and emotional revelations. The episode also explores the relationship between Nate and his father, shedding light on the complicated history that has kept them apart for so long.

Overall, "Kolcheck, A." is a thrilling and engaging addition to the NCIS: Los Angeles canon, showcasing the talented cast and crew that make the show so memorable. Fans of the series will not want to miss this exciting installment.