Episode Title:The Night and the Fury.Episode Description:The teens are doing a training exercise led by Astrid, to their disappointment: in the task, one must cross the island of dragons from one end to the other, at night, with no dragons, and 1 weapon. During this daring task, Hiccup encounters Dagur, his "brother" from the Berserker tribe. Dagur is hunting for the Night Fury that he thought Hiccup battled. He apparently has been hunting for many nights and has gone, well, Berserk. It is up to Hiccup and his friends to protect Toothless.