Callen’s ex-partner (Marisol Nichols) takes a Navy recruitment center hostage.

When military grade technology is stolen, a deaf engineer, Sienna Marchione, who always wanted to serve her country, and the only member of her team to survive the theft, helps…

Before Christmas, Hetty assigns Callen the case of his former foster brother and his wife who, upon reentry into the U.S., are framed for smuggling drugs across the border in…

Some of the team have to assume undercover identities in Moscow so that they can locate their suspects.

Callen and Sam are shocked when an old acquaintance, who they thought was the recent victim of a murder, appears and asks for their help. As the team investigates, they…

The team attempt to find an expert sniper after they learn about his connection to an extremist group.

Some presumed dead crew members show up from the missing tanker that was involved in Arkady’s deal with Russia.

Callen and Sam resume their undercover identities as a prisoner and guard to infiltrate a white supremacist group believed to be in possession of stolen nuclear material, while Kensi transforms…

The team investigate an arms dealer but are interrupted as the suspect’s building is overrun by terrorists.

The NCIS: LA team find out that one of their own has been compromised as they investigate the murder of a Navy contractor involved in illegal transactions of confidential data.

Suspicious of an undercover venture involving a deal between corrupt cops and military personnel, Callen and Sam try to expose the illegal operation by posing as California highway patrol officers.