Gaius Baltar is a fictional character from the television series Battlestar Galactica. He is a brilliant scientist and former presidential candidate who becomes a key figure in the struggle against the Cylons, a race of robotic beings. Baltar's intelligence and charm often lead him into complex situations, where he must navigate moral dilemmas and personal conflicts. Throughout the series, Baltar grapples with guilt and responsibility, especially after inadvertently aiding the Cylons in their attack on humanity. His character evolves from a self-serving individual to someone who seeks redemption, making him a compelling figure in the narrative of Battlestar Galactica.