The Incursean Armada, with the help of Dr. Psychobos, have invaded the Earth.
During a rare rainy Los Angeles evening, Martin and Jake head to Breakwire to enlist the help of his old friend Dutch, a grizzled ex-Navy Seal. When the lights go out in the building, the storm is suspected, but all hell breaks loose when Guillermo enters the premises. As the intensity ratchets up and people turn up dead, Jake’s ability to communicate with Amelia proves to be critical in defending his life.
When Drew moves out of Fiona's loft, Fiona gets a job and discovers the joys of Tweeting. She later comes across a burglar in her home. Meanwhile, Zig is tired of everyone talking about Campbell and acts out in French class. Also, Dallas finally gets Alli to go out with him but hides the fact that he has a child.
Frank has to transport a young hacker to her new employer. But the employer is not the only one that is interested in the girl. Meanwhile, Frank has a lunch date with Juliette that doesn't exactly turn out to become a romantic moment.
When Mabel befriends a cute merman trapped in the public pool, she's determined to help him out. Meanwhile, Dipper decides to volunteer as a lifeguard to see Wendy.
While trying to foil a Kraang invasion plot, the Turtles are hunted by a giant cockroach.
Amanda holds Alex hostage and tells Nikita she will release Alex in exchange for Ari. Michael assigns Nikita and Sean to handle the exchange of prisoners, but Ryan adds Owen to the team at the last minute, which makes Michael suspicious. While in captivity, Alex befriends a fellow prisoner named Larissa and vows to break them both out of the jail, which ultimately conflicts with Nikita’s plan, forcing Alex to choose between Nikita and her promise to Larissa.
Sofia decides to enter Clover the rabbit in the Village Faire pet contest, but after pushing a little too hard, Sofia discovers a few things about friendship when she ends up unintentionally hurting his feelings before the contest.
Nick, Monroe and Hank discover that members of a Wesen community have been responsible for a series of bank robberies; Juliette questions her mental state.
Recalling a series of prison therapy sessions that fueled his hatred of Rabbit, and pressed by Xavier’s insistence that the FBI handle a kidnapping case, Lucas makes a decision that will change the collective fate of Carrie, her family, Sugar, Job, and the entire Banshee police force. A special delivery at Alex’s doorstep leads Nola to reconsider her future; Kai teaches Rebecca the power of telecommunications.
Steve and Amy investigate a family who say they are getting sick in their family home and uncover what they feel is attacking their daughter with special needs. During the investigation, Steve uncovers past evidence of a fatal train disaster in 1907 caused by a flagman that occurred on the property which was the Rudd farm. The property history allegedly includes two men who threw dynamite inside a Black Methodist Church along with 4 men from the KKK who burned down the school next to it. Meanwhile, Amy says she confronts a beastly, dog-like apparition that she fears can kill anyone who gets in its way and an old man who was beating an 8-year-old boy named Elmer who once lived here.
Ryan winds up impressing Mike; after Mandy fails history and her laptop and cell phone are taken away, she starts using Mike's old ham radio.
Paranormal investigator Zak Bagans and his crew, Nick Groff and Aaron Goodwin, search for haunted locations both domestically and internationally. During their investigations, Zak and crew acquaint themselves with the general area; interview locals about the hauntings; and go face-to-face with the evil spirits who reportedly haunt these locations.
In a psychiatric hospital, Nurse Violet is brutally stabbed. An inmate is found over her body holding a bloody knife, but Dr Lucien Blake is unsure he is really the culprit and begins an investigation.
A beautiful stranger named Esme visits Elm Tree House and soon Carmen's head is turned by tales of a glamorous live in Rio. However, the rest of The Dumping Ground is more divided, with many kids thinking she's a snob. However, Mike soon falls ill and now Carmen has a choice: stay at Elm Tree, or run away to Rio?
A face from the past comes back to haunt Faith, and brings danger right inside the Dumping Ground. Mo buys a magic egg which hatches… into a snake! Elektra thinks it’s cool and decides to keep it as a pet.
Weather drives all but the desperate and stubborn in.Shawn and Cody claw their way back to port. Daryl struggles to get back to the dredge after losing his air. Zeke's on the gold, but low balls Emily on her cut. The fleet loses a dredger and friend.
The Holy Grail is one of the most sought after treasures of all time, and one treasure hunter thinks he knows exactly where it is. He invites Scott Wolter along on his quest to find it, and the result is a North American treasure hunt of epic proportions. Legends, a treasure map and the results of ground penetrating technology all point to the Grail being in a single location--a holy well on the property of a rumored Templar Prince. What Scott finds in and around the well will shock even the skeptics in this edge-of-your-seat season finale.
The girls go to the beach. Meanwhile, Emily and the E-Girls take leadership at a Dance Camp. They manage to accidentally lose one of the girls.
Reba thinks her dream of reviving her music career is one step closer to becoming a reality when she finally meets Geoffrey's boss, Mr. Bata, in person. But when he informs her that The Big Break he's giving her is writing commercial jingles, Reba begins to worry that her chances of getting back into the music industry may be over. Meanwhile, Kim lets Reba know that she is concerned about Sage's future when he decides against applying to Stanford because he doesn't want to be away from girlfriend June and also wants to pursue a music career.