Listen to the sound clip All to avenge Ragnar. from Vikings - Season 4: All to avenge Ragnar. All to avenge Ragnar. This sound is from Vikings - Season 4 Vikings, a critically acclaimed historical drama television series, first premiered in 2013 and has since captivated audiences around the world with its thrilling storyline and complex characters. Season 4, which aired in 2016, cont… Go to the full soundboardwith more sound clips Search