Kensi and Deeks are back together on NCIS: Los Angeles Season 5 Episode 21.

Well, they're working as partners again at least. Their personal relationship is still a bit undetermined, but they pick up where they left off, when Deeks promised to be patient with Kensi. 

Their first case back is an internal investigation of another NCIS agent, Paul Angelo, played by Daniel Henney. Angelo has been working undercover on a smuggling case. NCIS brings him into custody when they fear he's been turned and is working with the smugglers.

Is he dirty or not?

Check out the official CBS photos for "Three Hearts."

NCIS: Los Angeles Photos from "Three Hearts"

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And check out the preview for "Three Hearts" now:

Carla Day is a staff writer for TV Fanatic. Follow her on Twitter and on Google+.