EXCLUSIVE: 'Vikings' First Look! Lagertha Trains Her Protege for the Art of War in Winter Premiere

Creator Michael Hirst previews the last 10 episodes of season four.

is back for the second half of season four!

The History Channel drama returns in two weeks for the remaining 10 episodes of its current season. ET has the exclusive sneak peek at the winter premiere, which picks up six years later.

RELATED: Watch the 'Vikings' Season 4 Trailer

Embattled Viking leader Ragnar’s (Travis Fimmel) unexpectedly returns a hated man, and he openly challenges his grown sons to kill him if they wish to assume the throne.

In the heart-pounding first look, Lagertha (Katheryn Winnick) is preparing for battle, and this time, she’s training her protégé, Astrid (Josefin Asplund), who’s become a vital part of Lagertha’s life.

RELATED: 'Vikings' Season 4 Teasers Foreshadow Bloodshed and Death

“Lagertha, shield-maiden and warrior, teaches her young pupil and protege, Astrid, some of the arts of war. And then, perhaps, she will go on to teach her some other arts, too,” creator Michael Hirst tells ET of their burgeoning romantic relationship.

returns Wednesday, Nov. 30 at 10 p.m. ET/PT on History Channel.

Earlier this year, ET debuted the intense season four promos, foreshadowing death, destruction and mayhem. Watch below.