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NCIS Season 22 came to an end with episode 20 titled, Nexus on May 5, 2025. The high-stakes episode tied several loose ends of the season with a heartbreaking death at the end.
Gabriel LaRoche (Seamus Dever) is revealed to be a double agent from the beginning, and not everyone in the NCIS takes it well. It was none other than McGee who busted Gabriel’s secret mission, and now they are left with no insider in the Nexus.
Later, Carla Marino (Rebecca De Mornay), the mob boss from Kansas City, who was on Alden Parker’s (Gary Cole) radar from his FBI days, is brought in, and he refuses to work with her in this new setting. Initially, Parker underestimates Carla's dangerous intent, but as the episode progresses, she is revealed to be the one they had been searching for.
At the end, the NCIS team successfully discovers that the cartel was successful in stealing the nuclear material: the uranium. Also, the Nexus Leader, Carla Marino, finally takes her revenge on Parker by killing his father.
Disclaimer: The article contains spoilers. Readers' discretion is advised.
Here's what happened in the finale of NCIS Season 22.
NCIS Season 22 ending explained: Gabriel LaRoche’s secret revealed
Since the previous episode of NCIS Season 22, the team had been behind Gabriel LaRoche, suspecting him of corruption. With the finale, the deputy director is finally revealed to have been on a mission for the last eight months. It is disclosed that LaRoche was working as a double agent for the Department of Defense to destroy the cartel from the inside.
He was almost successful in convincing Valderrama’s Torres to be a corrupt officer and the mole to build trust with the cartel. However, NCIS’s investigation and Timothy McGee (Sean Murray) saved Torres but busted LaRoche for hiding important information from them as well as using them. After the revelation, LaRoche resigns, and NCIS is left with no insider in the cartel until Carla Marino shows up.
Also Read: NCIS finally brings back Gibbs in Season 22, but there’s a twist
NCIS Season 22 ending explained: Carla Marino becomes the new insider
The mob boss from Kansas City provides crucial intel to the team about the cartel looking for nuclear material. With LaRoche’s identity revealed, the team had to accept Carla as the new insider, and that does not sit well with Special Agent Parker.
Parker does not trust Carla and has been trying to capture the mob boss since his days in the FBI. However, reluctantly, he tolerates his nemesis just for the sake of finding the new Nexus leader, The Butcher.
With the help of an SD card that LaRoche got in last week’s episode, they find out that the cartel had acquired uranium, which they had failed to procure after the Atlas train was diverted in the earlier episodes of NCIS Season 22.
All of this information is supplied to the team by Carla, which solidifies their faith in her. Just then, she receives a call from the Butcher, who offers to sell her the uranium. Carla seems to be terrified after the proposition, assuming the Butcher would intend to kill her. To make her feel better, Parker suggests, she meet the new Nexus leader in Kansas City, her hometown, promising safety and backup in case anything goes awry.
However, their plan completely goes off the rails, as Carla is revealed to be playing a bigger game here.
NCIS Season 22 ending explained: Carla Marino is the new Nexus Leader, and her revenge on Parker at the end
Carla and Parker, with two other agents (one of them working for her), reach their desired location, which is the place where Carla’s son, Jason, died by accident after Agent Parker revealed to him that his mother is a criminal. Carla knocks him on the head with his gun and leaves him.
Meanwhile, Parker’s trust issues with Carla come in handy, as he has already cloned his phone. Kasie, therefore, discovers that Carla is the new Nexus leader they have been hunting, and she had been planning a big blow-up. The four crime family leaders were invited to her hotel with a bomb planted inside, which was on the verge of going off.
Parker helps in providing the code to deactivate the bomb, which were the five numbers that spelled Jason, Carla's son's name.
Although it looked like everything was over with Nexus, some personal issues remained intact and were finally resolved as Parker went home. He found his father, Roman, dead by having been shot in the chest by none other than Marino, ending NCIS Season 22 with vengeance.
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