Sub-Commander T'Pol:  Has it occurred to you what 's going to happen if Captain Archer fails ? If Earth is destroyed ?
Commander Charles 'Trip' Tucker III: Every day .
Sub-Commander T'Pol: Good . Then you 've already come to the conclusion that without Humanity , there 's no one to combat these Sphere Builders . Their Expanse will continue to grow , encompassing one system after another , including Vulcan . Your world is no longer the only _ one _ in jeopardy .