I'm surprised we don't have a thread for this Netflix series. It's been running for a few years now and they just released Season 5. It's based on England vs. the Vikings during the general period of King Alfred. I won't give anything else away than the basics. It's fictional but runs along the main historical back drop. I'm currently in the middle of Season 4, and Season 3 was probably one of the very best single seasons of a series I've ever seen. This is an underrated show. I think @purriwinkle in particular would like it a lot.