Transcription
Sharon: Assuming this wasn't just a bizarre dream, where does this put us? How do we find the Earth without destroying another universe in the process?
Nick: [Thinking] I suspect the universe I've been using as a "battery" is lost. The Gamester said it was uninhabited, so we have to take his word on that. As for the Earth...
Nick: Between our prior searches and the data from the "Nick-and-Trudy-verse", we've narrowed our search field considerably. It's now a matter of WHEN we find it, not if.
Fred: And once we DO find it? THEN what?
Nick: [Deflating] That's... the part I haven't figured out yet.
References: Nick's "battery" universe being uninhabited; The "Nick-and-Trudy-verse" and the data they collected

