Lagertha to continue to "kick ass" in 2016 Watch out, Europe. Vikings' Lagertha is back, and she's ready to kick butt. 'Vikings' Season 4: Sneak Peek Of 'Incredible' Second Half [PHOTOS], Clive Standen Teases 'Insane Stunts' Currently filming for Vikings's fourth season, actress Katheryn Winnick recently gave fans a behind-the-scenes look at fight training.