As the Greendale student body enjoys their year-end picnic, Dean Pelton announces plans for a small, quick, safe game of paintball. As the game heats up, alliances are formed – and broken – and friendships are put to the test. When a mysterious and threatening figure emerges on the Greendale campus, it becomes apparent that this is no ordinary game of paintball.
Claire and Gloria’s Mother’s Day excursion with the kids turns into the mother of all disasters. Meanwhile, Phil and Jay share an awkward moment when they stay home to prepare dinner for everyone. Cameron worries about gender roles in his relationship with Mitchell.
Things don’t go as planned when Mike and the kids give Frankie a day without the family as a Mother’s Day gift.
Lockhart/Gardner defends a patient in a liver transplant case against rival attorney Patti Nyholm. However, the case takes a turn when Patti is fired and asks Lockhart/Gardner to represent her. Alicia deals with emotional fallout from Peter’s one-night stand with Kalinda.
While investigating the shooting death of her ex-partner in New York, Beckett comes to believe the suspect has fled to Los Angeles. Against orders, she travels to L.A., going renegade to track down the killer, with Castle unexpectedly along for the ride. As they dig deeper into the motives, they uncover a trail that leads from a rooftop pool in Hollywood to the sandy beach of Santa Monica. Along the way, they visit the set of the “Heat Wave” movie (based on Castle’s book) and enlist the cast to help break the case. But as they get closer to apprehending the killer, Castle begins to wonder whether Beckett is out for justice or revenge.
When Marshall and Barney argue over the destruction of the Arcadian Hotel, Robin and Lily try to mix the right combination of cocktails that will force them to make up. Meanwhile, Ted plans a romantic weekend away with Zoey.
When the command ships blockade stars along Destiny’s path, the crew must find a different, superhot star to recharge at. Eli and Rush are forced to pilot the ship in, while the rest of the crew evacuates to a nearby planet… only to discover that the drones are already there.
Arriving at King’s Landing, Ned is shocked to learn of the Crown’s profligacy from his new advisors. At Castle Black, Jon Snow impresses Tyrion at the expense of greener recruits. Suspecting the Lannisters had a hand in Bran’s fall, Catelyn covertly follows her husband to King’s Landing, where she is intercepted by Petyr Baelish, a.k.a. “Littlefinger,” a shrewd longtime ally and brothel owner. Cersei and Jaime ponder the implications of Bran’s recovery; Arya studies swordsmanship. On the road to Vaes Dothrak, Daenerys finds herself at odds with Viserys.
As devastation spreads on This Side, Walter, Olivia, and Sam Weiss struggle to find a way to stop the destruction and discover that one individual has the ability to allow Peter access to the Machine.
Just as the study group are getting ready for their final Anthropology exam, Shirley goes into labor leaving the group to figure out the best way to help. Meanwhile, a riot in the parking lot starts during the World Food Festival.