Nell needs helping getting past her traumatic experience on NCIS: Los Angeles. "The 3rd Choir" is the fourth episode of the show's sixth season.
Nate makes his return, as seen in this scene from the January 15, 2013 episode of NCIS: Los Angeles.
Nate turns up unexpectedly in this episode as well. Here he meets Callen in the hotel.
Sam and Nate are reunited in the February 1, 2011 episode of NCIS: Los Angeles. Check out this image from "Lockup."
Deeks, Callen, Kensi and Sam made a foursome worth watching each week on NCIS: Los Angeles.
On NCIS: Los Angeles, Nate "Doc" Getz is an operating psychologist in the Office of Special Projects. He's pretty cool.

NCIS: Los Angeles Quotes

Kensi: Because once again you're trying to say something without actually saying it. And it's driving me nuts.
Deeks: I think you lost me.
Kensi: No. I don't think I did. I think you know exactly what I'm talking about.
Deeks: Do I?
Kensi: Damn it, Deeks, you asked me out on a date without actually asking me out on a date. Now, if this keeps going this way and we can't communicate, and we've been over this -- you never say what you mean, and if this is the way it's gonna be, then I don't know how we're ever gonna --
Deeks: I don't want to be here with you right now.
Kensi: What?
Deeks: I want to be at my place, right now ... with you.

Go wherever you please Ella -- I will find you once I am finished here.