Episode Title:Gold Rush.Episode Description:Dagur returns to the Edge claiming to know the location of Viggo's gold stores, and joins the riders on a mission to take back Berk's gold. The rush of events leaves Heather torn between her loyalties to the riders and wanting to join her brother on his current journey to find their missing father Oswald the Agreeable and rebuild the Berserker Tribe. The island where the gold is stored turns out to be empty save for strange looking ruins, and the others are captured by Viggo while searching. Heather, Fishlegs, and Dagur face difficulty saving them due to Viggo's dragon-proof ships until Heather and Dagur work together to take down the fleet. The riders return to the island and reclaim the hidden gold, and Heather finally decides to go with Dagur to find her father.