Harlee struggles with becoming an FBI informant while Wozniak suspects every member of his crew. Paranoid that Wozniak's search will lead to her, Harlee suggests polygraphng the entire crew, a plan that backfires. An appeals case sends Wozniak to watch tapes from his first encounter with Harlee, revealing a dark secret from their past. Meanwhile, Espada helps Tess deal with her husband's infidelity.
When Christy catches the eye of Candace's wealthy, charming father Fred, Candace and Baxter are outraged while Bonnie pushes Christy to give him a chance.
Finn, Jake, LSP and BMO seek shelter as they contend with some deadly weather.
Ryan, Jennifer, Keith, and Harry search the country for the most talented vocalists as the auditions continue in Denver and Little Rock, Ark.
To prove to Darwin that he can be unpredictable, Gumball decides to hug the first person he sees -- an anthropomorphic hot dog -- and Gumball ends up in over his head when he and the Hot Dog Guy can't stop bumping into each other.
Ryan and the judges continue their search for talent with auditions in Philadelphia.
Si recruits his nephews to help him transport a storage container to his backyard, but things take a turn when Jep becomes locked inside the box. Meanwhile, Jase helps Mia prepare for her cheerleading competition, but the only problem is he has no idea what he's doing.
When Missy's parents visit, her father convinces Jase to take him on a quail hunt. But while their “bonding hunt” yields very few quail, it does bring them closer together as friends. Meanwhile, Willie helps John Luke start his own snow cone business, but in order to make a profit, they'll have to overcome some growing pains.
One very spooky night, Finn and Jake come face-to-face with an urban myth.
Everyone is shocked when Douglas introduces a fourth bionic sibling named Daniel who’s been living a normal life with an adopted family. Daniel later comes to the academy to meet his father, uncle, and cousins. After Daniel's bionics are accidentally activated by the Lab Rats, Donald and Douglas find out what happened they have to come clean to Daniel about his power-replicating abilities. Daniel also finds out that his cousins are actually his biologic siblings. Filled with anger, Daniel goes out for air on the beach, where Leo and him have a conversation about Douglas. Not too long after, Daniel, using Leo's abilities, accidentally causes a leak in the hydro-loop's fuel tank. After Adam and Daniel combined their powers to stop it, Douglas apologizes to Daniel for lying and Daniel decides to give Douglas a second chance.
When Jestro and the Book of Monsters start using their monsters to ravage the countryside, the Knights get an awesome new HQ to fight him, the mighty, powerful Rolling Castle known as the Fortrex.
The teachers are put in charge of preventing bullying at Fillmore; Mrs. Adler confronts her past as a tortured teen.
A perfume mogul is killed in a savage manner and the investigation yields no prime suspect. Laura and Jake are at odds when they try to define the current state of their relationship.
When Caroline's grandmother Astrid awakens from a coma with no knowledge of her family's massive money scandal, Caroline attempts to keep the truth hidden for a bit longer by giving Astrid one last fancy luncheon.
Liza tries to sort out her relationship with Josh as her daughter Caitlin returns from school.
Liza questions Josh's interest in her while another publisher courts Kelsey.
Benson is taken hostage when she tries to stop a home invasion.
Molly gives Mike a device that will track his activity in hopes of helping him get healthier and take better care of himself, but Mike has other plans.
In the Chilean Andes, Grady and Bill start their survival mission high up on a snowy dormant volcano. They must get off the volcano, find shelter in caves, and trek down into the rainforest. Along the way, they search for food, and attempt to build a fire.
Forest ranger Felicity Ford is blinded by mysterious lights while driving at night in the village of Cooper Hill and the next morning her car is found abandoned at the roadside, followed closely by the discovery of her body. Visiting UFO spotters in the village are convinced aliens are responsible, but as Barnaby and Nelson try to get to the truth, they unearth suspicions, betrayals and long-buried secrets along the way.