I don't like being the bearer of bad news, but...you can't, exactly.

[Sympathetic, Wash tries to keep his voice light and lay down the bad news as gently as possible. It sucks that people keep getting dragged here from such important situations. It makes him want to help where he knows he can't actually do anything.]

Wonderland kind of traps us all here. No one's found a way to get back to where they're from. At least, not as far as I know.