Chuck: Season 3, Episode 17

3 - 17: Chuck Versus the Living Dead

Chuck dreams that Daniel Shaw is still alive, and things become awkward between him and Sarah during the investigation, when Casey goes through files and receipts describing Sarah and Shaw's trip to Washington DC together weeks earlier. Stephen Bartowski (Scott Bakula) returns and learns that Chuck downloaded the Intersect 2.0. He tells Chuck that he has created a device - The Governor - to calm the mind and prevent the intersect's negative side effects. It is revealed that this is why The Ring wanted Justin to capture Stephen Bartowski - to take the Governor and use it to support the brain of their own human intersect, Daniel Shaw.