Season 1 concludes with Brian dealing with a stunning betrayal as he and the FBI race to stop an NZT-enabled Sands and his associates from orchestrating an international incident of evil. Meanwhile, Brian also experiences devastating side effects when his NZT immunity begins to wear off.moreless
In the second-season finale, a mentally unstable ex-member of Scorpion kidnaps Toby and threatens to kill him unless the team meets his demands.
The FBI's worst nightmare comes true when NZT floods the streets of New York City and threatens to become a national epidemic. As efforts are made to stop it from spreading, a joint manhunt is launched to find the lab producing the drug; at the same time, Brian struggles to adjust to his new reality when he lacks the resources to continue searching for Piper.moreless
The Department of Defense hires the team to break into Fort Knox and steal an artifact in order to test their security system, but they must force entry once again when they discover something dangerous hidden inside the object.moreless
Ichabod and Abbie learn how to reactivate Pandora's Box, which may be their only weapon against the Hidden One as he prepares to bring about the end of humanity.
Rebecca takes NZT for the first time to see justice for her father's murder. To ensure success of his new plan, Sands makes a risky move against Brian.
While Ichabod and Abbie travel to the Catacombs to find a way to stop the Hidden One, the rest of the team stages a desperate holding action to keep the Hidden One from obtaining supreme power.moreless
The team's mission to recover the remains of marines in Vietnam is compromised when they find themselves in the path of a dangerous tornado.
The key to a current mystery lies in Ichabod's history with Betsy Ross. Meanwhile, Abbie must choose between Daniel and her career as a Witness, and Jenny tries to form a relationship with her father.moreless
Brian's double life unravels when Senator Morra makes contact just as Brian's placed under 24-hour surveillance by the FBI following his rogue trip to Russia. And the possibility of his connection to Morra being exposed seems even greater when Mike and Ike reveal to an already suspicious Rebecca that Brian had an off-book interaction with Morra's henchman Sands.moreless
To save Ichabod, who is trapped in the archive with the Hidden One, Abbie must make a deal with the devil. Meanwhile, Jenny hesitates when it becomes clear Joe may have to give up his life to save Ichabod.moreless
With his closest relationships imploding, Brian goes rogue from the FBI and heads to Russia to find the only person who can help him cut ties once and for all with Senator Eddie Morra. As he tracks down a former Morra associate-turned-adversary who possesses an alternative NZT vaccine, Rebecca comes closer to discovering Brian's secret.moreless
After Los Angeles' blood supply gets hacked and is deemed unusable, the team must find the perpetrator in order to save the life of a young girl in need of a heart transplant.moreless
A monster attacks Abbie and Sophie during a FBI wilderness training exercise, threatening to reveal the truth about the supernatural to Daniel. Meanwhile, Ichabod finds out more about Abbie's symbol, and Joe and Jenny obtain a fragment of Pandora's Box.moreless
Brian and Rebecca are placed under quarantine together after they are exposed to an unknown substance during an investigation into a citywide blackout. Already feeling too close for comfort, trust issues arise when Brian is caught using his stash of NZT.moreless
The Jersey Devil commits several grisly murders, but Ichabod and Abbie soon discover that the creature's plan involves the Hidden One regaining his power. Meanwhile, Joe and Jenny hit a hitch in their relationship, and Abbie has to choose between Ichabod and the symbol that kept her alive in the Catacombs.moreless
Sylvester competes on "The Price is Right". Later, the team must infiltrate a high-end car-smuggling operation that's preparing to ship bioweapons to South America.
Jenny meets with Ezra, who wants to help Abbie with her current emotional problems. Meanwhile, Atticus Nevins reenters the team's lives when he demands safe passage out of the country in return for his information on the creature that is stalking Sleepy Hollow.moreless
Brian is covertly enlisted by Senator Morra's henchman Sands, who finds that his dangerous past has caught up with him and he needs Brian's help dealing with a life-or-death threat. Meanwhile, it's up to Rachel to cover for her brother when the FBI comes calling about another case.moreless
Team Scorpion must stop an influx of drugs that are being smuggled into the country by drones. Meanwhile, Walter gives Happy and Toby an ultimatum on their new relationship.
The Kindred returns to Sleepy Hollow, leaving a trail of death in its path. However, Abbie and Ichabod soon discover that they can't simply exterminate it. Meanwhile, Daniel asks Abbie to return to the FBI, and Ichabod deals with his tattered relationship with Zoe.moreless
Sparks fly between Brian and an undercover FBI agent as they race to finish a case before her real identity is exposed. Meanwhile, Sands makes a surprising move to end Rebecca's investigation into Senator Morra.moreless
A living Gargoyle kills a man at a restored bell tower. However, Ichabod searching for Abbie on the astral plane, so Sophie teams up with Joe and Jenny to deal with the creature. Meanwhile, Pandora offers Abbie a way back to Earth... in return for the Eye of Providence.moreless
The team must fix a pinched gas line in order to prevent a massive explosion after a powerful earthquake hits Los Angeles.
While Ichabod continues his search for Abbie, he inadvertently releases a vengeance demon that feeds on desperation. Meanwhile, Sophie continues the FBI investigation into Abbie's disappearance, and Jenny and Joe try to obtain a map that may lead them to Abbie.moreless
The team is tasked with helping NASA's top-secret rocket launch, but they are forced to sabotage their own mission when Walter's date from the previous night has a bomb strapped to her chest.moreless
Brian embarks on his first FBI field assignment when he travels to Quantico to lend his skills to the bureau unit that catches serial killers. Meanwhile, Rebecca comes closer to discovering Senator Morra's connection to NZT.moreless