[s5e18] Point Of No Return -

Castiel , who rebelled against Heaven for Dean, reaches his limit. After Dean tries to trick him with an angel-banishing sigil, Cas delivers a brutal physical beatdown, shouting that he didn't give up everything only to watch Dean "fail". The Return of the Third Brother Supernatural: "Point of No Return" - AV Club

The episode opens with at his absolute breaking point. Convinced that saying "yes" to the Archangel Michael is the only way to stop Lucifer , he begins settling his affairs—packing away his leather jacket and the keys to the Impala . [S5E18] Point of No Return

In a devastating moment, Dean tells a pleading Bobby Singer , "You’re not my father," prompting Bobby to reveal the single bullet he considers using on himself every morning. Castiel , who rebelled against Heaven for Dean,

Dean’s despair leads to some of the show’s most painful character interactions: Convinced that saying "yes" to the Archangel Michael