While judging the hugest Battle of the Bands in the history of Ooo, Finn hears a mysterious new song.
The Ninja get 'special treatment' at the Kryptarium Prison, and the Mechanic wants to use Zane for spare parts. Nadakhan brings his crew back from other realms: Flintlocke, Clancee, Doubloon, Monkey Wretch and Dogshank. The Ninja start a food fight and befriend Soto, the captain who trapped Nadakhan into the Teapot of Tyrahn and told the Ninja how to stop Nadakhan: Tiger Widow venom, and bust themselves and Soto out of Kryptarium. Nadakhan visits the Djinjago realm and finds out that when the Ninja destroyed the Cursed Realm, this realm started to collapse. He promised to avenge the people of his Realm. The Ninja find out that the map is in a lantern aboard the Misfortune's Keep.
When Harvey, Fee and Foo find a bag of magical fireworks, Jeremy warns them to get rid of it fast, but it's a challenge because it gives temptation to play with the fireworks.
Hank meets a woman who fears she has an inherited disease. Eddie makes a medical decision. Jeremiah discovers that Boris went to clinical trials without his input.
Catch a wave with the Pawn Stars when an original Beach Boys surfboard rides into the shop. Will Rick hang ten with a totally awesome deal, or will he have a gnarly wipe out? Next, Rick gets adventurous when a magazine feature penned by Mark Twain turns up. Will it be an instant classic or will it be sold down the river? Then, things get sloppy when an early 1900s spirit hydrometer pours in. Will Corey have the liquid courage to make an offer or will he be off the sauce? And later, things get psychedelic when an original Peter Max Statue of Liberty painting is brought in. Will Rick liberate a deal or will it get torched?
A bombshell announcement brings a twist to the competition. Joanna and Claudia compete in the biggest coaches challenge in Ultimate Fighter history. Then, in the first light heavyweight semifinal, two friends battle it out for a spot in the finale.
Rebecca recalls first meeting Pilcher as an architect and the creation of Wayward Pines is revealed. Theo is shocked by a secret Rebecca divulges to him Teresa tells CJ and Adam she wants to live outside the protected walls as Megan experiments on the first female Abbie that has been captured.
As the city erupts in violence over an impending jury verdict, the night shift becomes ground zero when they have to take in the man suspected of the racially-motivated shooting at the source of the unrest. His presence in the emergency room sparks sharp conversation and disagreements among the staff over the highly-charged topic and even close friends Kenny and Paul find themselves at odds. Topher does his best to control the mounting chaos in the ER while out in the field, TC makes a decision as to which of two patients to bring in, leaving Paul and Scott to question TC's motives.
Grady and Josh slash their way through the Nicaraguan jungle battling snakes, mosquitoes and dehydration. They struggle to start a fire using a soil testing kit, go on a nighttime hunt for caiman and build a raft to cross croc-infested waters.
Shimmer, Shine and Leah plan to bake a super fun treat: flying cookies.
Follows the magical adventures of fraternal twin genies, Shimmer and Shine, who unintentionally create chaos while attempting to grant wishes for their human best friend, Leah.
Gabi and Sofia start working together, but things turn awkward when only one of them can land a coveted promotion.
Marriage annulments free Lillian and Beatrice from their matrimonial duties, though the former fights with Victor over their beloved Butternut Room, and the latter helps Albert conquer one of his fears. Meanwhile, Garfield clashes with a dishonest new servant.
Bonnie is less than thrilled when she finds out that Ben invited her estranged mother Nana Lyle to town for Emmas preschools family weekend. Meanwhile, Riley and Tucker enroll in an improv class in order to step out of their comfort zones and help them out in their respective careers.
Alicia receives an offer that Alvey believes looks more promising than it is. Jay and Ava celebrate his lightweight championship, retreating into each other. Alvey must make amends for a past accident.
The artists paint multi-body illusions on acrobatic contortionist models; guest judge gymnast Shawn Johnson.
Michael silences a traveling squeak while remodeling a home a hospital becomes the scene of a mind-bending game of cops and robbers.