Sometimes a Great Notion

Plot:

Scouting the planet reveals that there is no life except plants. The destruction occurred about 2,000 years earlier. Among the ruins, skeletons and wrecks of a different kind of Centurions are found. But closer examination of the skeletons reveals they are Cylon! Could the 13th Tribe really have been all Cylons? Chief Tyrol, Anders and Tory remember living on the planet and dying there. How did they get to the colonies? Starbuck finds a piece of her Viper, and despite Leoben's warnings, starts to look for the cockpit... Roslin loses her faith in the Scrolls of Pythia. Apollo and Dualla seem to get back together, but he needs to figure out what to tell to the people of the Fleet... A tragedy prompts Adama to confront Saul.