Contestants from past seasons return to inspire the current players; after a challenge where the teams battle the elements, the winners receive a special bonus prize; contestants face elimination.
The Duggars are in Atlanta for a little work and a lot of play. After attending a speaking engagement, it's time for some fun in the water, jet skiing, tubing and wake boarding. But happiness turns to worry when one Duggar has a terrifying accident.
The Duggars are under water - in an aquarium that is! The Duggars continue their visit in Atlanta, Georgia with their first ever trip to an aquarium. Later, the family meets professional surfer and shark attack survivor Bethany Hamilton.
An unusual looking 1947 Harley-Davidson Servi-Car (a three-wheeled motorcycle) rolls up, and Paul jumps at the chance to tool around on it. Jon brings back a rare, vintage British rocking horse from a pick, but Paul's sister Susan worries that it might not rock buyers. Finally the Gallery 63 crew can't resist a friendly wager on a vintage Italian multi-game table.
Silver is asked to make campaign videos for political candidate Marissa Harris-Young who is running against Teddy’s Uncle Charles for public office. Teddy runs into an old flame and Annie gets stuck with Leila during an important date. A surprise visitor threatens to tear Liam and Jane apart, while Naomi can't shake her growing feelings for Austin during a party to encourage students to vote.
SAMCRO’s relationship with the Cartel is in jeopardy when an important package is compromised.
Julio runs into the final test confirming that his sister has not left the Gran Hotel; Someone has tried to burn Cristina's bloody clothes in one of the hotel kitchens. A test that seems to confirm Julio's suspicions; Cristina is dead ... but ... who was to blame? And ... does this have something to do with the young woman who has just been killed in town? Meanwhile, the Alarcón family, attends to the evolution of Sofia who, after having fallen down the stairs, fears for the future of her son.
Michael is seriously not ready to overcome his fear of bridges. Dr. Wasserman and Sammy push David to tell Michael about the book.
Kristina goes to the hospital with unlikely company; Julia and Joel receive good news; Crosby is bothered by Jasmine's dates; Seth returns and could put a damper on Sarah's relationship with Mark; and Amber helps Max reconcile with Jabbar.
Milli, Geo, and Bot are meeting their friend Colin at the Umi City Toy Store.
BTR refuses to record their second album after Gustavo is too hard on them, and the strike pits the band against their producer in a battle of wills.
While investigating the mysterious shooting death of a young woman, Castle and Beckett face a cop's worst nightmare when they discover that the gun used in the killing is Det. Ryan's old service weapon - the one that was stolen by the serial killer, 3XK. Now with the clock ticking, the team must work to solve the murder, track down 3XK and retrieve Ryan's gun before the killer strikes again.
PC Penhale is shocked by the unexpected arrival of his ex-wife Maggie, who appears to have forgotten that they separated years ago and wants to know why he left her. Eleanor goes on a date with local fisherman Paul Hale, an old friend she has not seen since school, while Martin and Louisa finally agree on a name for their baby
Special Agent Rockgut contacts the penguins with a warning that Red Squirrel has brainwashed one of them.
The animals think Julien caused old lady Gladys to slip and hurt herself.
Kowalski is laid up in the hospital, so he can't attend the invention expo, and it's driving him crazy.
Taylor's friend Dana hosts a game night but the attempt at light-hearted fun spirals seriously out of control when Kim suspiciously spends most of the night in the bathroom and Brandi makes some outrageous accusations as to why.
After celebrating the release of his new book, Jonathan learns some distressing familial news. George reunites with his daughter Emily and Ray spends time with his biological son Spencer. Meanwhile, Jonathan's latest case leaves him in a precarious position.
After some very unusual weather hits Bannerman Road, Sarah Jane investigates why. Fish are falling from the skies, and Sarah Jane's investigation ends up leading the team to the Museum of Culture. After Clyde acts the fool a little to much, his friends end up turning against him, and he is banished from their lives.