NCIS: Los Angeles's Hetty Lange is in deadly trouble during "Praesidium," but that won't stop Deeks and Kensi from lightening the mood with a little relationship humor.

Why Will Deeks Return To LAPD On 'NCIS: LA'? Eric Christian Olsen Teases Kensi Problems

Hetty (Linda Hunt) will pass out during her meeting with the Department of Justice in episode 3, and Callen (Chris O'Donnell) will be quick to jump to her defense. Much to his displeasure, however, the rest of the special projects team won't be ready to jump on a jet to D.C., preferring to discover who bought their boss' address in Los Angeles (see first video below).

While viewers have to worry about Hetty's fate until Monday night, a Densi clip manages to provide a bright spot in the darkness. The partners will take their investigation to the docks, and the prospect of owning a yacht will prompt Deeks (Eric Christian Olsen) to question whether Kensi (Daniela Ruah) would ever consider moving in with him.

'Heart-Breaking' Densi Conversation In Store For 'NCIS: LA', Kensi Grilled About White Ghost

Meanwhile, Nell (Renee Felice Smith) will have to go undercover at Hetty's house, and her brief time in the field will leave her rather traumatized. So much so that the intelligence analyst will require a visit from the team's operational psychologist, Nate Getz (Peter Cambor).

Find out more when NCIS: LA airs Mondays at 10 p.m. ET on CBS.