Kensi has to watch Deeks go undercover with another female agent on NCIS: Los Angeles. "Parley" is the 23rd episode of the show's fourth season.
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NCIS: Los Angeles Season 4 Episode 23 Quotes

Callen: I'm sorry. Did I miss something? Who are these guys?
Kensi: They aren't guys. They're WODs. W-O-Ds.
Callen: Is that like a B-F-F with an S-T-D?
Kensi: W-O-D is Work Out of the Day.

Deeks: I was just gonna see if you were good.
Kensi: Yeah. You?
Deeks: I'm good if you're good.
Kensi: I'm good.
Deeks: Okay. That's good. We're good. Which is, you know, great.
Kensi: I'm glad we cleared that up. See ya tomorrow.