It seems like Floki isn't the only one dubious of Ragnar's (Travis Fimmel) allegiance with the Christians.

8 things to expect from Vikings Season 3

In this exclusive sneak peek of Thursday's Vikings, Rollo (Clive Standen) approaches his brother about the claims that Ragnar has made them betray their gods with this new war. But Ragnar diffuses Rollo's doubts with expert diplomacy - but for how long? And will Floki come around or is this the final straw?

Vikings airs Thursdays at 10/9c on History.