EXCLUSIVE: 'Vikings' Star Alexander Ludwig Talks Bjorn's 'Power Play' and 'Transition' Out of

Three episodes into the season four return of Vikings, audiences are getting a good look at how the show's characters have evolved since Ragnar's disappearance -- starting with Bjorn.ET hopped on the phone with Alexander Ludwig on Tuesday, who dished on his character's new leadership skills, and what lies ahead for Ragnar's firstborn as the Viking leader loses his spark.
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