Jesse begs Walter to go to the police or the DEA, but Walt refuses; he reasons that Gus can't stop production, and with Gale out of the picture, Gus would have no choice but to keep him.
Jesse begs Walter to go to the police. Jesse begs Walter to go to the DEA. Walt refuses. Gus can't stop production. This is what he reasons. Gus would have no choice but to keep him. This is with Gale out of the picture.