A sniper targets the Federal Building lobby, putting Moretti and Donnie in the crosshairs. Before long, Pierce concludes that the shooter fears low-frequency radio waves. Meanwhile, a beguiling woman prompts Donnie to run for office.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
Clarke and Bellamy search for supplies as winter nears. Meanwhile, Octavia helps a friend escape.
Clarke finally makes contact with the arch and Bellamy brings a grounder to the camp to try to get some answers.
Thanks to Andrew Palmer, Mitch is cleared of murder charges in the Martin Moxon death while Abby and Tammy finally decipher the cryptic list of numbers Moxon slipped Mitch.
Mitch also takes on the case of Dr. Richard Kellner, who is seeking an injunction against a rival pharmaceutical company in the hopes of protecting his life's work - a promising Alzheimer's drug.
With Galactica on the verge of falling apart, Admiral Adama readies the ship for what could be its final mission, as Baltar's Six warns that humanity's final chapter is near.
A woman takes hostages on Cloud Nine and demands that Adama turn over Sharon in order to avenge her husband's death at the hands of the Cylons.