Things are getting pretty intense on Season 3 of “Vikings.” First Princess Kwenthrith (Amy Bailey) poisoned her beloved brother, then Siggy (Jessalyn Gilsig) met her frosty fate while trying to save Ragnar’s (Travis Fimmel) children, and now Lagertha (Katheryn Winnick) will come face to face with a foe in episode 5, which is rightfully titled “The Usurper.”

Fans have watched as Lagertha’s supposedly right-hand man Kalf (Ben Robson) slowly usurped her throne, and now the shieldmaiden will learn of his treacherous ways when she returns to Hedeby in the upcoming installment. According to the synopsis for “The Usurper,” Lagertha will learn that her Earldom has been taken from her and will convince Ragnar to “travel to Hedeby with her in an effort to reclaim her title.” Kalf is a brave but stupid boy. Doesn’t he know the Lothbrok’s are unstoppable?

In a sneak-peek clip from episode 5, Lagertha will confront Kalf about stealing the crown. “I know you must hate me,” the traitor begins.  “Just let me say that I was born here in Hedeby. I belong here. I have a better claim than you do even though I share the world’s admiration for you.” Kalf then goes on to say that despite not believing in titles, he wants the label of Earl so that he can “do good things for the folk” of Hedeby.

But Lagertha could care less about what Kalf wants to do with his new, stolen power. After all, he betrayed her! “The fact is you planned to betray me, and you must have planned for a long time,” she says.

Kalf owns up to his disloyalty, claiming he desired the stunning shieldmaiden while he planned to overthrow her. “I never stopped desiring you,” he adds. But what is Lagertha supposed to do with that knowledge? That’s when Kalf starts putting them moves on her. But we suggest he back off -- and quick. Hasn’t he seen Lagertha wield a sword?

The summary concludes that the fleet will be greeted with great tragedy when they arrive in Kattegat. We've theorized this has something to do with Ragnar, Rollo (Clive Standen) and the gang learning of Siggy’s demise. But it looks like the Nordic warriors will wipe their tears and continue forward as Ragnar reveals a “great surprise when he announces the next raid.” Pack your bags, “Vikings” fans, because it looks like we’re finally headed to Paris!

“Vikings” will air episode 5, “The Usurper,” on Thursday, March 19 at 10 p.m. EDT on the History Channel.