Baltar is a brilliant but narcissistic scientist who unwittingly aided the original Cylon destruction of the 12 Colonies. He subsequently became a full-fledged Cylon collaborator: As the President, he surrendered New Caprica to them, and after the evacuation of New Caprica he traveled with their fleet and explored their spiritual beliefs until he was recaptured by his fellow humans. While awaiting trial for treason in the Galactica's brig, he won the affection of many of the Colonial fleet's downtrodden by writing a manifesto that detailed his poverty-stricken childhood and excoriated society's "elites." Upon his acquittal and release, his most devoted followers have begun to treat him as a holy man. They may not be wrong: Baltar's ostensibly mystical visions of the beautiful Cylon Number Six remain unexplained.
Writer of Helix & BSG - Ron Moore answers some of your facebook questions.
Check out an inside look at the design of Battlestar Galactica: Blood & Chrome.
Get a closer look into the main characters of Battlestar Galactica: Blood & Chrome.