What began as faint enthusiasm has boiled over to full-blown devotion among its small legion of fans. Whether or not that inspires Thomas to do a fourth season, he promised the end of Season 3 will be much like the process of growing up: satisfying but open-ended.
“I don’t think we would ever do a proper finale,” Thomas said. “It’s not really like that. The way it finishes is fine, yeah, but we’d never do a tidy end.”
Source and more: Huff Post