New season starts tonight on History Channel. Like last season, this season will be split up into 2 parts of 10 episodes each. The first 10 episodes will run through January, 2018 and the last 10 episodes are supposed to air later in 2018. Tonight's season premiere will show the first 2 episodes (a 2-parter) of the new season back to back at 9:00 and 10:00 PM EST. But one hour prior to the premiere at 8:00 PM will be a recap of the first 4 seasons regarding Lagertha's story.