第 21 季 共 10 集
播出时间：2024年2月13日
第 1 集 Algún Día
播出时间：2024年2月13日
The NCIS team must help Torres when he puts his future at stake by confronting the man who tormented his family when he was a child.
第 2 集 The Stories We Leave Behind
播出时间：2024年2月20日
As NCIS mourns the loss of Ducky, the agents find comfort in working on one of his unfinished cases involving a woman whose father was dishonorably discharged from the Marines.
第 3 集 Lifeline
播出时间：2024年2月27日
When the NCIS team engages in Walk-a-Mile day to gain a new perspectives on different departments, things take a turn when Kasie receives a distress call from a mysterious man.
第 4 集 Left Unsaid
播出时间：2024年3月5日
The NCIS team is in a race against time to find a missing officer who disappeared during his wedding proposal.
第 5 集 The Plan
播出时间：2024年3月26日
With the help of Knight's dad, NCIS works to unravel the mystery of a recently used service weapon belonging to a missing agent. Also, McGee is in a tailspin when DNA results reveal a close relative he was unaware of.
第 6 集 Strange Invaders
播出时间：2024年4月2日
After discovering a navy pilot's body riddled with unusual wounds, NCIS' investigation draws the team into the rabbit hole of UFO conspiracy theories.
第 7 集 A Thousand Yards
播出时间：2024年4月16日
NCIS comes under attack by a mysterious enemy from the past. Also, Vance tries to mend fences with his estranged son by explaining why, despite the ongoing dangers of his job, he still chooses to stay at NCIS.
第 8 集 Heartless
播出时间：2024年4月23日
The NCIS team looks for a motive behind the kidnapping and death of a famous heart surgeon.
第 9 集 Prime Cut
播出时间：2024年4月30日
After discovering the remains of a Marine captain, the NCIS team travels to Texas to interrogate the suspected killer.
第 10 集 Reef Madness
播出时间：2024年5月7日
Parker and Knight discover three bodies on an old Navy ship that's about to be sunk and turned into an artificial reef, when they're suddenly locked inside by a mysterious figure. Also, Vance offers Knight a unique opportunity.
