The BAU team investigates a series of murders in Bakersfield, Ca, which have left the victims unidentifiable. New agent Kate Callahan joins the BAU fold, and assists in the effort to solve the cases.
David Reynolds looks at how World War I gave birth to an age of turbulent mass democracy.
A popular biker-bar owner is killed, with the case leading Laura and Jake to the scene of their first date. The twins can't outwit their new ex-con babysitter but, just to be sure, Laura has Max spy on them.
The temperature rises at Brownall when a local hot-tub manufacturer wants to recruit a new sales team - and Trish and Karl each tell a lie which spirals out of control.
The teams must identify proteins and match them to their dishes, with the winners getting a day at the beach with water polo players Genai Kerr, Shea Buckner and Tumua Anae; family night dinner service.
A parole officer uses a puppet to connect with convicts, a man in a neck brace attempts to party down, a Nazi officer tells the story of the time he saw Hitler, and Levi goes steampunk.
Mr. Mackey is now gluten free and everyone is annoyed when he wont quit preaching about how great he feels. But, after witnessing a disturbing demonstration of what happens to your body when you do eat gluten, South Park becomes the first town in America to go gluten free.
Bobby's gift idea for Andi doesn't resonate with the friends, so Kate intervenes. Unaware that Val rented out their old house, Will makes an unannounced visit, only to get trapped inside.
Patrick moves out of the house Tom eats all of Josh's special truffled mac and cheese.
Out to prove she's not un-setup-able, Kate persuades Lowell to fix her up with his friend. Andi decides to get more involved in the neighborhood, but Bobby's not on board with the idea.
Severide returns to Firehouse 51, but he is clearly not his usual self. Dawson counts down the weeks until she gets started as a candidate at the Austin Firehouse. Mills learns more about his father’s family. Herrmann asks the rest of the Molly investors to come up with some new ideas to turn the business around.
In B.C., a truck full of wine is sliced in half... Less than 24 hours after Jamie ships the Rotator to Alberta. Howie must tackle this monster recovery all on his own. And a cascade of wrecks on two different highways mean both Al Quiring and Adam Gazzola must face their own night from hell.
Jess' dad arrives with his new girlfriend, who happened to be Jess and Cece's high-school rival. Meanwhile, Schmidt recruits the guys to be part of a focus group at work to help him land a big new account.
The artists must make incredible art by sand blasting glass while trying to survive working in teams. Rivalries explode when they tattoo head to head.
Will signs up for online dating and challenges Kate to see who can find a better mate. Andi goes to extremes to get Charlie into a posh preschool, and Jules fills in as Kate's assistant.
A Navy lieutenant on shore leave dies of the bubonic plague, sending the New Orleans team into a tailspin to locate all other sailers on liberty to control an outbreak and find the source. Special Agent Tony DiNozzo gives a helping hand.
Bobbys idea of a surprise gift for Andi doesnt resonate with the friends, and Kate finally intervenes, showing him a few tricks in the process.
Lowell and Jules decide to adopt a dog, but Jules takes it to the extreme when she gets to the shelter.