He could very well feature in a scene that happened in the past. The huntsman released Snow White in ep. 7 in FTL. This week’s show, episode 15, happens immediately after Snow White is released by the huntsman. Since the FTL events are all flashbacks, the huntsman is still alive there and could feature in such a flashback.
"That’s how you know you’ve really got a home. When you leave it, there’s this feeling that you can’t shake. You just miss it." Neal Cassidy