When Gibbs spots the brother of an "NCIS Most Wanted" suspect, he takes the opportunity to assume his former alias and go undercover with their infamous anti-government militia. This leaves the NCIS team to piece together where and what Gibbs is up to. Meanwhile, Bishop and Reeves partner up on an off-the-books investigation.
Axl begins to panic when he realizes that he only has four months of college left before he graduates, and he hasn't sent out any job resumes - something he should have started when he was a junior. Meanwhile, Brad agrees to lead Sue's no-cut a cappella group as they enter a music competition, and Brick desperately asks for Frankie and Mike's advice when girlfriend Cindy tells him that he reads too much, and if he doesn't stop, she'll break up with him.
As Jess tries to find a new vice principal, she discovers that she has a real problem when it comes to making decisions. Meanwhile, Cece enlists Jess and Reagan to help her recruit new models, and the guys are in for a surprise when they enjoy a day at the spa.
Oliver tells his parents that he's so embarrassed by their modest house that he'd rather not have a birthday party at all. Katie decides to teach him a lesson by ambushing him with a surprise party at home with all his wealthy friends.
Detectives continue searching for physical evidence related to the John Doe in the barrel. Awaiting DNA results from a tooth found on the body, detectives sift through remaining pieces of the barrel in hopes of finding other clues to crack the case.
Sebastian is sent undercover and Patton exercises his former gambling skills, as Pride and the team attempt a dangerous operation to trap Garcia.
Ms. Watson tries a premium online dating service Ms. Snap learns she's teaching the worst group of kids in the school Mrs. Alder is assigned a mobile classroom.
David and Stevie must come to terms with their new relationship, while Alexis and Moira become anxious when they schedule a rare motherdaughter lunch.
As the birth date of her triplets quickly approaches, a frazzled and emotional Rebecca forgets Jack's birthday. Dr. Katowski struggles with the loss of his wife and wonders how he'll be able to continue on with his life without her. Joe, the firefighter who delivered baby Randall to the hospital, fights to save his marriage.
After Kenny and Brett officially become a couple, Kenny starts to think of plan on how he should break the news to his parents. Meanwhile, Jimmy surprises everyone when he scores a high SAT score, forcing Eileen to hold up her end of a deal that she had previously made and takes Jimmy car shopping.
Severide agrees to a bone marrow donation but a work accident throws everything into flux. Casey and Dawson try to find harmony at home. Meanwhile, Otis and Mouch decide to film a PSA encouraging people to join the Chicago Fire Department but hit a creative wall in the process.
Coulson and Mack discover a shocking secret about Mace, which leaves all of S.H.I.E.L.D. in a dangerous position.
Bob Lee, Julie, Nadine and Isaac work together to breach the Russian embassy, save Mary, shut down the conspiracy and prove Bob Lee innocent.
Mary Jane is pitted against her idol Ronda while Niecy tries to balance her life.
Scott, Lydia and Malia decide to storm the rift and rescue Stiles Liam, Hayden and Mason make a deal with Theo to learn Douglas' plan.
A courier truck rolls over Mark finds himself in the middle of a crash zone on the during a storm and the crew are faced with an icy airbag job.
Father Brown investigates the murder of a Colonial Postal Service officer when the fair comes to Kembleford.