They're going undercover so that you can investigate the death with this nuclear power plant's security guard who died of radiation poisoning. Incidentally, this poisoned security guard is really a Gunnery Sergeant. Check out the plot for this sequel:
When a Gunnery Sergeant moonlighting as a security guard at a decommissioned nuclear power plant suffers radiation poisoning, the team goes under cover to investigate.
Whilst the episode 12 promo does give attention to Kensi and Deeks a great deal, additionally, it shows us that Sam and Callen might be in grave danger. The pair are observing a bomb that is apparently near to detonating. Will they allow it to be out of the devote time? Watch this episode and stay tuned for more updates.