While the Justice Society is visiting the Justice League for the first time, Batman is in Asia infiltrating a secret fortress where Ra's Al Ghul is plotting a new scheme for world domination.
Sam and Dean are once again on the FBI’s “Most Wanted” list when two Leviathans clone the brothers and go on a killing spree. The subject of a nationwide manhunt, Sam and Dean need to drop off the grid so Bobby sends them to Frank Deveraux, a quirky surveillance expert, for help. Meanwhile, Bobby continues to search for a way to kill the Levianthans, or at least slow them down, so the real Winchesters can stop their evil doppelgangers.
Nick Burkhardt's life is completely transformed when his family's legacy is revealed to him and he discovers that he is a Grimm, a monster hunter who can see the creatures for what they really are.
After a music producer spots Jessie and Luke performing in the park, he promises them fame and gets them to his studio to shoot a music video. However, Jessie and Luke fight over the spotlight, causing problems. Meanwhile, Bertram enlists Emma to help style him for his social network profile photo, and Zuri and Ravi take Tony's place at the reception desk to prove to Tony that his job is not as hard as he makes it seem. When Tony finds out about Jessie and Luke, he warns them that the "manager" is a fraud who fools people for their money. Jessie and Luke resolve their problems and abandon the manager, and Tony shoots a new music video for Jessie's song with Jessie and all of the children starring in it.
Without the Intersect in his head or the support of the CIA, the world of espionage is a much more dangerous place for Chuck Bartowski and his team of freelance spies. To start, Carmichael Industries takes on a slick, rich thief named Jean Claude, and a conniving investor, Roger Bale, who has stolen money from some of the world's most dangerous people. Meanwhile, Morgan helps Chuck with a special surprise for Sarah. Back in the Buy More, Jeff and Lester have taken things to another level with their latest scheme.
While searching for information on the black box, Birkoff stumbles upon Nikita’s birth certificate. Nikita and Michael track down Nikita’s father Richard, but the reunion is not quite what Nikita expected. Percy tells Alex that the black box that Nikita has contains information that could help her avenge her father’s death.
The guys explore an abandoned mental institution complex in upstate NY.
The ThunderCats meet the mysterious beings who had helped them during the night and they turn out to be the Berbils, or Ro-Bears. The Berbils treat the ThunderCats with great hospitality until the village is attacked and some of the Berbils are captured. The ThunderCats help their new friends and a battle for freedom ensues.
As Mystic Falls prepares to celebrate the traditional Illumination Night, the town is invaded by spirits of the dead. After a particularly violent encounter with an angry spirit, Damon asks Bonnie to find the reason behind the ghosts' surprising power. Elena convinces Jeremy to use his connection to the other side to help her find a new way to reach Stefan, leading Jeremy to a terrible choice. Finally, Alaric discovers a long-hidden clue to the past.
Owen stresses teamwork and moves his leadership role over to the baseball field when he signs the doctors up for a baseball league, pitting them against their biggest competition, Seattle Presbyterian; Lexie tries to hide her jealous rage when she sees Mark with a new woman, but her emotions get the better of her; Alex fights to keep Zola at Seattle Grace after it is suggested that she be moved to another hospital due to a conflict of interest with Meredith and Derek; and Richard scolds Meredith and Bailey for their feud
Reese becomes romantically involved with the newest Person of Interest: an attractive woman who isn't all that she seems.
Deciding the Circle needs to have a little fun, Faye convinces Cassie to throw a big Halloween party. Intent on wooing Jake back, Faye goes all out on her Halloween costume. After a fight with Diana, Adam turns to Cassie for advice. Meanwhile, some dangerous, uninvited guests set their sights on the Circle.
A cute comic book artist puts Leonard and Priya’s relationship to the test, while Sheldon tries to scare the guys for Halloween.
When a personality test suggests that one group member is a homicidal maniac, they use a series of scary Halloween stories to expose the killer.
When the CBI team travels to a resort town to find out who murdered a police chief, Lisbon crosses paths with her brother Tommy, now a bounty hunter, who's tracking a bail jumper.
Andy and April host a Halloween bash at their house. Tom emcees an event for Leslie's campaign. Andy and April receive an unusual wedding present from Ron and Ann.
Erin works to make a spooky, non-childish Halloween party with help from Gabe. Dwight becomes friends with Robert's son, and Pam and Jim debate the existence of ghosts. Meanwhile, Robert tries to figure out everyone's deepest fears.
The gang plays the most twisted board game ever. Dee and Dennis face Mac, Charlie and Frank.
In the conclusion of the finale, the remaining contestants ready their collections for the runway. They are given an additional $500 to spend at Mood to finish their looks. Then they present their lines to industry insiders at Fashion Week.
A global cataclysm, caused by a fatal accident in Geneva (Switzerland) during the implementation of the particle accelerator will lead to the crew and students of the school-ship Polar Star to live the greatest adventure of their lives. Isolated and aware that we only have each other, the ship will become their only home.