when dean and sam find out chuck is god
In Supernatural , Sam and Dean first meet Chuck in Season 4, Episode 18, “The Monster at the End of This Book,” but they do not find out he is God until Season 11, Episode 20, “Don’t Call Me Shurley.”
Quick Scoop
At first, the brothers think Chuck is just the prophet writing the Supernatural books, and they’re very skeptical of him.
The big “Chuck is God” reveal comes much later, when the show confirms what had only been hinted at before.
What that means
- First encounter: Season 4, Episode 18.
- Reveal as God: Season 11, Episode 20.
- Fan reaction: The reveal reframes earlier episodes and makes Chuck’s odd behavior and prophetic knowledge feel like clues in hindsight.
In plain terms
So if you’re asking when Dean and Sam realize Chuck is God , the answer is Season 11, Episode 20.
TL;DR: They meet Chuck in Season 4, but they learn he’s God in Season 11.