While Liv eats the brains of a overly-positive coffee shop owner to help Clive solve her murder, Boss closes in on the man who is cutting in on his Utopium trade. Meanwhile, Ravi tries to create a new cure with the Utopium sample they obtained from the corpses.moreless
Cage's stubborn refusal to release the captive ark members and his unwillingness to begin negotiations towards a peaceful resolution forces Clarke to make a drastic and difficult decision. Meanwhile, Chancellor Jaha reaches his goal; and discovers it is not at all what he expected.moreless
A major setback halts Wick and Raven's plans. Jasper and Maya are witnesses to a horrible act.
The tension between Clarke and Abby comes to a head after Clarke crosses the line. Octavia fights for someone she loves while Raven helps Bellamy navigate Mount Weather. Jaha and Murphy encounter a stranger who may not be what they seem to be.moreless
Brutal consequences are faced by Bellamy and Lincoln. Meanwhile, Abby fights to stay in control; and Jasper confronts President Wallace.
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
Both the Ark and the 100 celebrate Unity Day. The Ark is devastated by first an explosion, then an attempted coup. Meanwhile, on the ground, Clarke, Finn, and Octavia set up a meeting with the grounders.moreless
Finn and Clarke's new relationship becomes a little more complicated. Octavia is knocked out and abducted by a Grounder.
An antibiotic is sought to treat Jasper's wounds. Meanwhile, Bellamy and his crew hunt for food.
The surgical interns are presented with an impromptu medical quiz with a chance to assist in surgery as the prize, and Emily and Cassandra emerge as the winners. Emily reluctantly agrees to speak to a group of girls about safe sex after an STD outbreak at a local high school. Meanwhile, Emily struggles to forget about her feelings for Will.moreless
58 years before the fall, two families, the Graystones and the Adamas, live together on Caprica, a colony many light years away from Earth where a startling breakthrough in artificial intelligence brings about unforeseen consequences.moreless