There is also one more possible explanation for Harington’s presence on the set – it could make sense if the producers have some flashback scenes coming up in season 6. That’s not a very popular storytelling tool with this show, but we never know what the writers might decide to do.
If nothing else, it would be a nice gesture to fans of Jon Snow who are missing the character and want to see him on the screen one last time. We don’t know what kinds of flashbacks they could show that would feature him, on the other hand.
But given the show’s vast array of characters and the different subplots it has going on, we have no doubt that the writers could find a way to implement something like this in the story if they really wanted to.
The more likely version is still that Jon Snow will end up returning for season 6, however – maybe not in many episodes, but most of the show’s fans definitely expect to see him in some capacity in the upcoming new seasons, and they’re all very excited about that possibility. It’s one of the most actively discussed bits of speculation about the show right now.