Valley of Darkness is an episode of the TV series, Battlestar Galactica, and aired during the show's second season.


The following is taken from Wikipedia, and can be found here.

Having just jumped away from a battle with Cylons and rejoined the civilian fleet, a Cylon virus forces Galactica to switch to a limited emergency power as the crew fights off a boarding party of Cylon Centurions. Apollo releases President Roslin from the brig and she makes her way to sickbay just as the last of the Centurions are destroyed. With Galactica safe, Doctor Cottle makes his way to operate on a still-critical Commander Adama.

On Kobol, Tyrol and Cally return to the rest of the stranded survey team with the medical kit they had retrieved for a wounded Socinus only to learn that his death is inevitable. Tyrol reluctantly euthanizes him with lethal dosage of painkillers.

On Caprica, Starbuck and Helo stop at Starbuck's old apartment, where they listen to a recording of Starbuck's father playing the piano as Starbuck reflects on her life. They retrieve the keys to Starbuck's truck and escape the city in it.