When “Game of Thrones“began to dominate the world of television, “Vikings“was the series that climbed above everything. Although historians disagree over the character of Ragnar, the History Channel show was a hit and was based on real-life individuals; nonetheless, the show is a fan favorite. The outstanding characters and performers who play those characters are one of the reasons why "Vikings" works. One of the show's outstanding casting decisions was to get Alex Hgh Andersen to play Ivar "the boneless."