You will Watch Dragons: Defenders of Berk Season 2 Episode 18 online for free episodes with HQ / high quality. Stream cartoons Dragons: Defenders of Berk S02E18 Bing! Bam! Boom! When Three Adolescent Thunderdrums follow Hiccup and Stoick back to Berk, the trio of Dragons prove to be a handful for the Dragon Academy to train. When the dragons are forced to live on dragon island, the group learns they can’t survive without a father, so Stoick releases Thornado so he can take care of them.