'NCIS: Los Angeles' season 8 episode 7 spoilers: Callen goes undercover as mental patient, Eric Christian Olsen talks Densi's future

Callen (Chris O'Donnell) goes undercover as a patient in a mental hospital in the upcoming episode of the hit CBS procedural drama "NCIS: Los Angeles" season 8.
Titled "Crazy Train," next week's episode will see another interesting undercover mission for one of the team. According to the official synopsis for episode 7, Callen goes to a mental hospital for an undercover mission. As he tries to blend in as one of the patients, Callen must search for a missing NSA agent who previously disappeared while tracking down an ISIS cell attempting to cross the Mexican border.
The past few episodes have already established that Kensi has finally woken up from her coma, which is celebrated by the whole team. However, the bad news is that her recovery won't be easy. At the end of episode 5, Kensi (Daniela Ruah) woke up and squeezed Deek's (Eric Christian Olsen) hand with her right, but she wasn't able to move her left hand.
As for this week's episode, the team worked on a case involving a maintenance man who saved the life of a lieutenant commander. As the investigation progressed, the team uncovered the man's dark past that puts a local teenager in danger. Additionally, Sam (LL Cool J) also struggled to decide which of his colleagues to take with him to the LA football game.
Kensi is still having a hard time dealing with the possibility that she may never walk or join the force again, but Deeks will surely stay by her side no matter what happens. Showrunner Scott Gemmill has previously hinted that the discussion of kids will come up a lot for Kensi and Deeks. Speaking with TV Guide, Olsen shared his thoughts on how Kensi's latest ordeal will affect the future of their relationship.
"I think this is going to serve as another great obstacle that either turns into a foundation for the betterment of the relationship," he explained, "one of these things that they use as just another rock to build this foundation ... or an obstacle which becomes a roadblock. ... And I don't know the answer to that. That's why I'm answering this as a hypothetical, because we're not that far along with it."
Catch all-new episodes of "NCIS: Los Angeles" airing every Sunday night at 8 p.m. ET on CBS.