The episode begins with the discovery of , who is found dead in an alley after departing the USS Allegiance . The investigation takes a terrifying turn when it is revealed that she was infected with Ebola .
: In Los Angeles, Kensi Blye and Marty Deeks track Grant’s final movements. They discover that a group of extremists kidnapped Grant to use her as a "human bomb" to spread the virus at a VA hospital . Watch Ncis los angeles s11e04 webrip x264-ion10-1
: While Hetty Lange is mentioned as being on a mission in Washington, D.C., she only appears in credit during this episode. Cast and Production "NCIS: Los Angeles" Yellow Jack (TV Episode 2019) - IMDb The episode begins with the discovery of ,
: The team successfully corners the primary suspect, Fadel Ali , at the hospital before he can cause further infection. On the ship, the "outbreak" is largely determined to be psychosomatic, sparked by fear, though the threat was authentic. Key Character Milestones They discover that a group of extremists kidnapped
: Guest star Wesam Keesh returns as Ehsan Navid, who has transitioned from a civilian source to a full NCIS Special Agent. His presence highlights the long-term impact the OSP team has on those they encounter.
This episode is well-regarded by fans for its focus on character growth, particularly for "Densi" (Deeks and Kensi).
: Throughout the case, Kensi is uncharacteristically cautious about potential exposure. She eventually reveals to Deeks that she is late on her period , sparking a conversation about their future and the possibility of starting a family. By the end of the episode, it is confirmed to be a "false alarm," but the experience shifts Kensi's perspective on motherhood.