This week, we had the season finale of Season 5 [Part B] and it has also been announced that Season 6 will be the end of the show.
However, since it'll be 20 episodes, expect it to be once again split into 2: Season 6 [Part A] and Season 6 [Part B]. I'm hoping that the final episode of the entire show will be approx 90 minutes, as well as possibly Episode 11 (the first episode of Part B.)
On the ending of the show, creator Michael Hirst has this to say:
"I always knew where I wanted the show to go and more or less where it would end if I was given the opportunity. What I was trying to do was write the saga of Ragnar Lothbrok and his sons. After six seasons and 89 episodes, that’s what I felt — finally — I’d done. We stopped shooting the final episode in November last year and I felt that I’d said all I needed to say about Ragnar and his sons. I told my saga, and I’d been very fortunate to be given that opportunity by MGM and History. I had no reason to want to continue it beyond that. But, there are 20 new episodes to come. We visit three new worlds in those episodes, we go through great tragedies and great heroism, and if you have tears to weep be prepared to weep them as you watch Season 6. I’m very proud of the show. I did what I wanted to do, that’s the truth.
I don’t want people to think the show is ending anytime soon because it’s not. Later this year we’ll see the first part of Season 6. I’m desperate for people to see it because it is the most ambitious and intensely emotional episodes of “Vikings” ever. Each season I set new challenges for production and they always meet them. Each season I up the ante and they always do it — whatever it is I ask them to do. A lot of what we shoot is real, it’s not CGI, and the way production manages to realize what I put on paper is transcendental. It’s incredible, it’s fantastic. So we have new worlds, new landscapes, new characters… and the scope just seems to be bigger. As are a lot of the issues. We’re on a world stage now with the Vikings, so everything is greater and more significant. And I swear to all the fans. It is a truly, deeply, emotional experience so I look forward to people watching it."