Team Scorpion work undercover on a cruise ship to locate and disable stolen rockets. Meanwhile, Toby and Happy help Ralph deal with his first crush, as Valentine's Day approaches.
A 10-year-old girl Sam once provided protection detail for in Saudi Arabia goes missing, and he's convinced her disappearance is directly connected to the theft of software for a new unmanned-aerial vehicle being developed by her engineer father.moreless
When a prison inmate is murdered, a serial killer claims to have information useful to the case. Frankie readies himself for the detective exam.
After a young dockworker is killed, evidence surfaces that the mob has connections to dock operations, which brings up questions regarding involvement by Maura's biological father. Jane does everything she can to get out of sensitivity training. Meanwhile, Maura and Tommy start spending time together.moreless
When a serial killer strikes in Los Angeles, it grabs the attention of Abby Sciuto. She travels from Washington DC to give the team a hand, since she has been following this killer for some time.moreless
In Los Angeles, Gibbs and McGee continue working with the NCIS division in order to track a terrorist cell. Agent Callen goes undercover, while a psychologist uncovers the truth about the relationship between Gibbs and Agent Macy. Meanwhile, Tony fears that Ziva may not be loyal to NCIS.moreless
The team heads to LA to work with the team there to investigate a murder, which soon turns into something bigger. Meanwhile, Tony begins snooping into Ziva's private life.