"Star Trek: Enterprise" Shockwave, Part I (TV Episode 2002) - Jolene Blalock as Sub-Cmdr. T'Pol

Sub-Commander T'Pol : You're very adept at listing the questionable decisions you've made. But there have been other decisions, many of them, that no one would question. I'm willing to try to convince my government of that; are you willing to try to convince yours?

Captain Jonathan Archer : You know... this has got to be the first time a Vulcan... has ever attempted to cheer up a Human.
Captain Jonathan Archer : I'm placing you in command. I advise you to maintain your present course and speed. I don't know what's going to happen. But try to keep an open mind... especially when it comes to things the Vulcan Science Directorate says are... "impossible".

Sub-Commander T'Pol : I'll try.
Captain Jonathan Archer : I never thought this was possible either. But... I traveled through time. And I need you to believe me.

Sub-Commander T'Pol : Why?

Captain Jonathan Archer : Because it's hard enough trying to fathom all this without having my Science Officer, a colleague who I trust and rely on, the person who got me to stop feeling sorry for myself, accusing me of being an hallucinating madman.
Sub-Commander T'Pol : The Vulcan Science Directorate has concluded that time travel is impossible.

Captain Jonathan Archer : Well, good for the Vulcan Science Directorate.

Jolene Blalock: Sub-Cmdr. T'Pol