Hetty is playing a dangerous game on NCIS: Los Angeles.

'NCIS: LA' Season 7: Russian Episode Title Revealed, Find Out Character Will Return

For reasons that have yet to be revealed, the diminutive OSP guru will choose to blindside Deeks (Eric Christian Olsen) and Kensi (Daniela Ruah) with an emotionally crushing assignment in "Come Back." Jack (Matthew Del Negro) is back, and Densi will be tasked with protecting Kensi's ex-finace. The catch? The partners won't know whose back they're watching until they arrive on scene.

Check out the sneak peek below to see Jack's first appearance since season 5.

'NCIS: LA' Season 7: Jack Is Back! See How Deeks Will Handle The News In New PHOTOS

Will the return of the White Ghost throw Densi for a loop? It's safe to assume that his sudden appearance will bring up a whole host of confusing feelings for Kensi, and none of those could possibly bode well for her plans to move in with Deeks. One guy already abandoned her, and while Kensi has moved on, those memories could bring a little trepidation into the Densi relationship.

Are you excited for Jack to return, or are you worried about the mess he could cause? Give us your thoughts in the comments section!

NCIS: LA airs Mondays at 10 p.m. ET on CBS.

Tags: NCIS: LA NCIS: Los Angeles television CBS