Malcolm engineers Slade's escape to train Oliver and Thea in how to survive. Meanwhile, five years ago Amanda brings Oliver and Maseo to Starling City to recover the Omega bio weapon, and Oliver must decide whether to stop China White or stay with his friends and family who are falling apart without him.moreless
Brick abducts three city alderman and demands that the mayor remove the police from the Glades. With Oliver gone, Arsenal and Diggle are all that stands between the crime lord and control of the district. However, Laurel insists on helping them, carrying on her sister's legacy as Black Canary. In the past, Maseo reveals to Oliver that he will do anything to save his family.moreless
Ra's al Ghul gives Oliver 48 hours to find Sara's murderer... or watch as the League kills 50 citizens a day. Meanwhile, Ray tries to apologize to Felicity for kissing her, and Oliver discovers who Sara's killer is.moreless
In this Night of the Living Dead inspired special, Doofenshmirtz's latest -inator, accidentally turns the citizens of Danville into contagious repulsive versions of the evil scientist who run rampant all over town. Agent P and the kids have to find a way to save Danville before they become mindless clones as well.moreless
Paracelsus takes control of Warehouse 13 and uses his newfound abilities to terrorize the team... and then travel back in time to create an new timeline where he rules the warehouse.
100 young criminals that have been living in space on The Arch have been sent to Earth to test if it has become inhabitable after 97 years of being abandoned after a nuclear war.moreless
When Candace is stumped about what to get Jeremy for his birthday, she reluctantly asks Phineas and Ferb for their help in creating the ultimate gift. Meanwhile, Doofenshmirtz plans to make fears a reality with his Worst-Fear-Inator, but his plans backfire when he finds himself battling his own fears instead.moreless
Oliver goes after China White and her new partner, Bronze Tiger, when they interdict shipments of medicine intended for a hospital in the Glades. Meanwhile, Officer Lance captures Roy and Thea gives her boyfriend an ultimatum, while Laurel continues her hunt for the Arrow.moreless
When Vanessa learns that her father has inherited a Drusselsteinian castle right next door, she seizes the opportunity to throw the biggest Halloween bash ever. The whole town is there, including Phineas and Ferb, who act as the event's party planners and DJs. Meanwhile, Doofenshmirtz enlists Perry to help him find a large, hidden treasure that his great aunt has placed somewhere within the castle.moreless
When Linda is overwhelmed in organizing a block party, she asks Phineas and Ferb to set up a laser light show for a grand finale, leading Candace to be disappointed since it's not bust-worthy considering their mom requested it. And surprisingly, Doofenshmirtz isn't up to anything evil since he's helping Norm woo a female robot during the same party. But at the end, certain twists occur.moreless
The boys set out to prove the existence of the elusive Chupacabra to the world, but Candace can't stand the wait and needs to first just prove it to mom. Meanwhile, Doofenshmirtz has the brilliant idea to use his Switch-Place-Inator to remove hair from one person and give it to another so that he can in turn sell his hair growing tonic.moreless
The agents capture Paracelsus, but soon discover that's exactly what he wants. Meanwhile, Myka goes in for surgery and Artie tells Claudia a family secret.
Candace thinks her day will be easy when the boys actually ask her to get Mom if they get stuck in their gigantic reproduction of the Gordian Knot, but when Jeremy stops by and asks for her help to open his personal mini safe, she finds her day getting a little more complicated. Meanwhile, Doofenshmirtz plans to eliminate every all-you-can-eat buffet in the Tri-State Area with his Eat-It-All-Inator.moreless
After bronzing Claudia, Paracelsus escapes with the only artifact that can cure her, and the team has to hunt him down before it's too late. Meanwhile, Claudia's link to Warehouse 13 endangers the building and Mrs. Frederic.moreless
The agents investigate when a series of mysterious incidents occur at an expensive gated community, and soon discover that someone is using an artifact to get revenge.
When Candace thinks Jeremy is bored with their usual hangouts, she sets out to find something unique to do with him. Meanwhile, Phineas and Ferb power through town surfing on a giant ball of water and Doofenshmirtz plans to use his Double-Negative-Inator to confuse his local eatery into giving him a wintery drink that is usually not served during summer.moreless
H.G. calls the agents when she needs help with an artifact. Meanwhile, a series of mysterious quakes shake the warehouse.
While Pete and Myka travel to Las Vegas to investigate a series of deaths involving falls from great heights, Claudia and Steve become involved in horse racing. Meanwhile, Artie tries to cope with the B&B's new manager.moreless
The boys make a giant inflatable wading pool for Mom. Meanwhile, Candace reveals her "Emo" side, and Doofenshmirtz attempts to become ruler of all bees.
Deadshot is back and working with China White to kill Malcolm Merlyn. While Oliver goes after the two assassins, he struggles to help Tommy resolve his issues with his father and navigate a new relationship with old girlfriend McKenna.moreless
Oliver takes Felicity's advice and asks McKenna out on a date. Meanwhile, Thea befriends a pickpocket named Roy Harper, Moira takes on Malcolm, and a jewel thief who calls himself "Dodger" strikes at one of Oliver's friends.moreless
While Cheshire and Sportsmaster hunt down Aqualad to take revenge for Artemis' death, Black Manta gives his prisoner, Miss Martian, 24 hours to live.
The boys create Rutabaga-themed vehicles when Candace is chosen to be Rutabaga princess and gets to start the "Running of the Chinchillas." Across town, Doofenshmirtz plans to turn himself into a real live Kinderlumper to scare Roger into relinquishing control of the Tri-State Area over to him.moreless
When April's science project attracts the Kraang's attention, the turtles must step in to save the day.
While Raphael takes a turn leading the group, Leonardo ventures elsewhere and meets Karai, a female ninja with dark secrets.