Vikings will venture into season 4 with three intriguing cast additions.

'Vikings' Season 4: Will Lagertha Kill Kalf? Series Creator Talks Continuing Feud

The History Channel drama began shooting for its fourth season at the start of April and now, a month later, the series is easing the hiatus new drought by teasing three new characters.

The ailing King Ragnar (Travis Fimmel) will face new threats to his power in 2016. If dire medical straits weren't enough to lay low the famed warrior, perhaps a little rivalry with King Harald Finehair and Halfdan the Black will do the trick.

'Vikings' Season 4: How Far Will Ragnar Take His Revenge Against Floki? Michael Hirst Explains

Finehair is a Scandinavian warrior (not an aptly named salon), according to The Hollywood Reporter, and he and his brother Halfdan will undoubtedly throw a wrench in the Danish King's plans as season 4 wares on. Peter Franzen and Jasper Paakkonen will play King Finehair and Halfdan the Black, respectively.

While the Finehair's of the North will be busy stirring up trouble, another traveler will cross paths with the King of Wanderlust. Ragnar will get his first glimpse at the Far East when Yidu (Dianne Doan), a Chinese character, strolls into the storyline.

Find out more when Vikings returns to the History Channel in 2016. Click the video below to see a preview for the series' latest episode, "The Dead."

Tags: vikings television history channel