Supernatural

Season 5, Episode 18

Episode Title: Point of No Return

Air Date: 2010-04-15

Overview:

Dean begins to think the only way to stop Lucifer is to say yes to Michael, but the angels decide they don't need him anymore. Dean, Sam, and Castiel are horrified at the angels' new game plan and take on Zachariah to prevent an all out war on Earth. Meanwhile, a familiar face returns.