Callen's inconspicuous cover as a mailroom employee will put him directly in the middle of a terrorist hostage situation on NCIS: Los Angeles.

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Set to air after the midseason hiatus, "Spiral" will give fans a skyscraper full of action. With Callen trapped on the inside when the baddies take control, it will be up to Sam, Kensi, and Deeks to get him out while dealing with an entire office building that is rigged to blow.

From Deek's hanging out a 16th floor window (see photos above) to rooftop helicopters, the Dave Kalstein ("Three Hearts," "Tuhon") penned episode will pack in the action. Unfortunately for Kensi and Deeks, they will take a little break from the mayhem when they find themselves sitting with the rest of the captives. Let's hope that was part of the plan.

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However, fans still have several more episodes to get through before "Spiral" airs after the midseason hiatus. "Reign Fall" will see the team investigate the murder of marines who have sons in military academies while "Humbug" will throw Callen's girlfriend into the center of a holiday case.

Find out more when NCIS: LA airs Mondays at 10 p.m. ET on CBS. Click the video below to see a preview for the series' latest episode.