History Channel released two teasers for the upcoming fourth season of the historical drama series "Vikings" in the last couple of weeks. One provides a sneak peek of the newlywed couple, Rollo and Princess Gisla of Frankia, in their bedroom in which the princess is reluctant to consummate their marriage.

In the promotional video, Gisla (Morgane Polanski) is seen to be in distress. She cries and murmurs a prayer as a shirtless Rollo (Clive Standen) kicks off his shoes and tries to charm her. She tells him to leaver her alone, and Rollo assures her there is nothing to be afraid of.

"Don't touch me. Monster!" she yells at him when he joins her in bed. When he tries to kiss her, she pulls off a dagger and aims it at his throat. He chuckles and leaves the weapon in her hand. He pulls the pillow under her head and says goodnight to his wife.

As seen in another series trailer that debuted during the 2015 Comic-Con, it was revealed that Rollo will accept Emperor Charles (Lothaire Bluteau)'s deal: the Viking warrior shall marry his daughter in exchange for his allegiance to his kingdom. This means that Rollo will be fighting his own brother, Ragnar (Travis Fimmel).

The betrayal is further emphasized in a promo trailer.

However, Standen's interview with IGN suggested that his allegiance to the Franks might just be a tactical strategy of the Vikings to finally penetrate Paris.

"The real question is: Is Rollo really gonna betray his brother? Or is this gonna be another route into Paris again?" Standen teased.

Meanwhile, speculations are saying that King Ragnar may fall in love with a new character, Yidu (Dianne Doan). This new character is being described as "mysterious," and Doan further elaborated this in her talk with International Business Times. "The people of Kattegat have never seen someone like her, from her looks, to views on the world and beliefs," said the actress.

"Vikings" season 4 premieres on Thursday, Feb. 18 at 10/9c on History.