Azazel is a fictional character on The CW Television Network's drama and horror television series Supernatural. He serves as the main antagonist during the first two seasons. A demon, he feeds his blood to infants so that they will grow up to develop demonic abilities.
Azazel was a powerful demon and a Prince of Hell who served Lucifer. Until Sin City, Azazel's name was not revealed and he was referred to by nicknames such as The Demon, The Yellow-Eyed Demon, or Yellow Eyes.
"All Hell Breaks Loose" is the joint title for the two-part second-season finale of The CW television series Supernatural. It consists of the twenty-first and twenty-second episodes of the second season. "Part One" was first broadcast on May 10, 2007, and the second part aired the following week on May 17...
Azazel is a Yellow-Eyed Demon, one of the Generals of Hell commanding the Demon armies of Hell, and seemingly the only one still active by 2007. He was the first supernatural creature and the first Demon who appeared in the series.