Watch NCIS: Los Angeles Online: Season 12 Episode 17

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Who was targeting NCIS officers?

On NCIS: Los Angeles Season 12 Episode 17, the gang worked with Joelle when they learned of the murder of someone close to them.

Helping From Ops - NCIS: Los Angeles Season 12 Episode 16

The cast turned on its head when Joelle revealed that CIA officers were also being targeted in a similar fashion.

Meanwhile, Kensi received a threatening postcard from David Kessler, who was obsessed with her.

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NCIS: Los Angeles Season 12 Episode 17 Quotes

One of the advantages of having your leg cut off. Everyone starts talking to you like you're the Queen of England.

Joelle [to Callen]

Sam: You didn't say what agency you're with.
Agent: No, I didn't.