Sub-Commander T'Pol:  He said you 're the only one who can end the conflict with the Xindi . You ca n't do that if you 're dead .
Captain Jonathan Archer: That 's if you accept Daniels ' version of the future .
Sub-Commander T'Pol: He 's in a position to know .
Captain Jonathan Archer: I thought you were the skeptical _ one _ when it came to time travel .
Sub-Commander T'Pol: Our recent visit to Detroit has tempered my skepticism .