After one of the 100 return to camp with a virus, getting many of them sick, Octavia, Finn, Jasper, and Raven devise a plot to try to hold off the grounders from war.moreless
Clarke finally makes contact with the arch and Bellamy brings a grounder to the camp to try to get some answers.
Alice and the White Rabbit raise an army to stop Jafar, who has changed the laws of magic and forced his father and the Red Queen to love him. The sorcerer then imprisons the Jabberwocky and raises an army of the dead to put down the rebellion, and travels to the Well of Wonders to face Alice in a final showdown.moreless
While the Jabberwocky tries to free herself from Jafar's control, Jafar sends the Knave to steal from Alice... putting their friendship to the test. In the past, Cora sends the Knave to find Alice and offers him his heart if he succeeds.moreless
After they find the Knave, Alice and Cyrus go on one mission while the Red Queen goes with the Knave and ends up confronting the Jabberwocky. Meanwhile, in the past, Cyrus' inadvertently causes his mother's injury and is forced to pay a great price.moreless
Stephen feels uneasy about fellow ULTRA trainee, Hillary, who has her own secret agenda. After his mother insists the family go camping with Peter, Stephen asks John and Cara to ensure everything is okay with Astrid while he's gone.
Emily and Micah are scrambling to help a patient who desperately needs a kidney transplant, but they are confused when she turns down a kidney donation from her new husband. Emily helps Dr. Bandari and Dr. Hamada with a dangerous surgery to repair a defective heart valve in a baby that a patient is carrying for her sister. Emily vies for a position as Dr. Bandari's research assistant, hoping to prevent Cassandra from spending too much time with Will. Cassandra, however, is willing to do whatever it takes as she pursues Will.moreless
In the year 2036, Peter, Astrid, Walter, and Etta set out to find Olivia and free her from amber. Once they do, they discover she holds the key to finding the plans for a weapon to defeat the Observers... but Walter is captured and interrogated for the same information.moreless