Lorelei reveals a secret from beyond the grave that disrupts Ostara and provokes a power struggle on Ascension.
In the Midseason Finale, Clarke returns to Camp Jaha with devastating news. Finn struggles with the aftermath of his actions. Abby gathers information from an unlikely source and prepares for a fight. Meanwhile, flashbacks reveal Finn and Raven's relationship on the Ark.
The death of a Freak sparks troubling behavior in Pepper. Elsa reveals the history of the Freak Show. Desiree grows suspicious of Maggie.
Gault investigates an explosion on Ascension and Enzmann deals with a consultant Director Warren has hired to investigate Stokes’ death and keep an eye on him.
A global scientific event causes millions of people to suddenly vanish from the earth, leaving angst-ridden teenager Ian Finch in a desperate race home to save his five year old brother. But when he gets there, everything about his world has changed and his brother is missing. Now, in order to find his brother and unravel the mystery, Ian must team up with a mysterious stranger and fight through earth's new reality and into another - with the government in pursuit and time running out. An explosive teen sci-fi action adventure!
As the dust settles, the gang find themselves dispersed around the ancient necropolis. And they soon realize they are not alone… the space is crawling with a magical army of the undead. The race is on to find Jason before he falls prey to the flesh eating monsters.
An unsuspecting traveler brings a blood-sucking legend with him to Portland, and Nick (David Giuntoli) and Hank (Russell Hornsby) find themselves investigating the gruesome trail of “El Chupacabra.” Meanwhile, Monroe (Silas Weir Mitchell) and Rosalee (Bree Turner) prepare to leave for their long-overdue honeymoon as they are met with more threats regarding their marriage. Elsewhere, Viktor (guest star Alexis Denisof) and Adalind (Claire Coffee) decide to take a trip of their own, while Wu (Reggie Lee) decides to confront Nick about what he has been seeing.
In the aftermath of the Snow Queen's spell, our heroes try to pick up the pieces and Regina has to make a difficult choice. Hook's fate hangs in the balance as Gold's quest for power threatens everything he holds dear. And, in the Enchanted Forest flashback, an intrusion during Belle's stay at Rumplestiltskin's dark castle will wreak havoc in both the past and the future.
With Flynn on the road searching for a way to recover the lost Library, Baird now has to keep three neophyte Librarians -- Cassandra, Stone, and Ezekiel -- alive, all while training them to investigate bizarre mysteries. Their first case, a simple missing persons investigation, leads them to a wildly successful modern agribusiness in Boston. They discover, however, that the "modern" business has been around a very long time, and its success is based on sacrifices made by the firm's employees. Literal sacrifices.
With the holidays approaching, Bonnie attempts to replicate her favorite traditions, while reminiscing about happier times with her friends. Not able to return home to Mystic Falls for her favorite time of the year, Caroline is surprised when Sheriff Forbes (recurring guest star Marguerite MacIntyre) brings the holidays to her at Whitmore College. Meanwhile, after discovering that Jo (recurring guest star Jodi Lyn O'Keefe) has gone missing, Alaric turns to Damon and Elena for help, while Liv (recurring guest star Penelope Mitchell) and Luke (recurring guest star Chris Brochu) find themselves at odds when Tyler approaches them with a risky plan. Elsewhere, Jeremy helps Matt carry out a plan to take down Enzo, but grows concerned when Matt takes things too far. Lastly, Stefan is forced to break some devastating news to Caroline.
Nyssa al Ghul returns to Starling City and tells Oliver that her father, Ra's al Ghul has given Oliver 48 hours to find Sara's killer or the League of Assassins will start killing the citizens of Starling City. Laurel is stunned when her father delivers a very special Christmas gift – her mother, Dinah (recurring guest star Alex Kingston). Meanwhile, Ray tries to make amends with Felicity and Oliver sets a meeting with Ra's al Ghul.
Fifty-one years into the Ascension's journey to find a new world, the first murder onboard the spaceship reveals the cracks in the isolated community.
Gault investigates an explosion on Ascension and Enzmann deals with a consultant Director Warren has hired to investigate Stokes' death and keep an eye on him.
Set in the near future, public service privatization and increased mass unemployment figures have spurred years of strikes, riots, and widespread disruption. In response, government restrictions on Internet and social media sites have been implemented. Anthony, who has interrupted his studies at university to look after his younger sister Sam after the disappearance of their parents, lands a job working in a records room and begins to discover the untold story behind his parents' disappearance.
Ninety-seven years ago, nuclear Armageddon decimated planet Earth, destroying civilization. The only survivors on orbiting space stations are now exiling a group of 100 juvenile prisoners to the Earth's surface to test whether it's habitable. For the first time in nearly a century, humans have returned to planet Earth.
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