Claire enters into a forced marriage with Jamie, but soon begins to experience deeper feelings for him.
Alan and Jordan's work on decoding the virus is seeing progress, while Julia is being cured by Hatake.
On day 5, Alan tries to find out what happened to Doreen after discovering her body, Julia finds a helpful friend on Level R, Sarah keeps hiding an infected patient in her room and Balleseros tries to find the mysterious Dr. Hvit.moreless
On day 4, the quarantined people on Level R force Dr. Hatake to re-etablish communication by cutting off the air supply. Meanwhile, Peter's condition worsens quickly, forcing Alan to try the untested universal treatment, Sarah has to question her rapid response test and Doreen gets closer to figuring out Balleseros.moreless
On day 3, Peter seeks Alan's help before he collapses, Sarah finds a rapid response test for infected patients, Julia begins to slowly feel the effects of Peter's attack while Balleseros helps Doreen get another monkey sample.moreless
Dr. Alan Farragut and his team of CDC scientists are called to a remote Arctic Research Base where his brother got infected with a deadly and unknown virus. Soon Alan and his team have to realize that there are secrets being kept.moreless
The CDC team tries to find a treatment for the infected patients and contain the virus by hunting down the ones who were exposed to the virus. Meanwhile, panic rises amongst the people on the station.moreless
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.