As “Vikings” fans know, when Ragnar Lothbrok (Travis Fimmel) sets his mind on something, nothing can dissuade him, and despite the shocking death of his closest friend Athelstan (George Blagden) in the March 26 episode of the History drama, the Norse leader is still determined to raid Paris and see what kind of treasures are hidden behind its supposedly impenetrable walls.

Below, Variety has an exclusive clip from the April 2 episode of “Vikings,” titled “Paris.” Read on for what the stars had to say about the show’s epic journey to the new kingdom of Francia.

Fimmel previewed that when Ragnar ventures to Paris, “he meets his match” in Emperor Charles (Lothaire Bluteau), even while the two are on separate sides of the city walls. And in the meantime, there’s plenty of friction within the Norse camp, according to Fimmel: “There’s a lot of relationship stuff during the siege and by the end of it, it’s the first time that Ragnar lets everybody else have their ideas — but he [still] steps up and tells everybody he’s king and the true leader.”

Katheryn Winnick (Lagertha) teased that the scope of the show has grown immeasurably with the journey to France. “It was really amazing to see, to walk on set and see the set designers building the Paris walls, and the costumes, and the different cast members that have joined us in Season 3. Even the background actors — their look is completely different than the burly redheads and blondes that we’ve been seeing for the last two years. So, it’s really exciting. The series is just getting bigger, and more explored; worlds are being created and there’s never a dull moment.”