Episode Title:
Triple Cross.
Episode Description:
After Johann believes he has found the location of a Dragon Eye lens in a cave, he sends Viggo in to find it. While down there, Johann and Krogan decide that Viggo is no longer useful and collapse the cave entrance leaving him trapped with a Monstrous Nightmare. Later, Hiccup receives a Terror Mail supposedly from Stoick saying that he has found a Dragon Eye lens and to meet him alone. When he arrives, he realizes that Viggo is the one who sent the message and Viggo tells the story of his betrayal and asks for Hiccup's help. Hiccup refuses, but Viggo reveals that he has poisoned Toothless with Red Oleander, and that Toothless will die in three days if they do not recover an antidote from Johann. Using a Skrill as a diversion, Hiccup and Viggo enter their headquarters where Viggo betrays Hiccup to earn favor with Johann and Krogan once more. However, this is all part of their plan and Hiccup and Toothless escape their cell and rendezvous in Johann's Quarters, only to discover that Johann had moved the Dragon Eye to another location. Johann and Krogan realize Viggo's deception and a fight ensues, resulting in Viggo sustaining lethal injuries before rescuing the Skrill and reuniting with Hiccup. Viggo reveals that Red Oleander is not harmful to dragons and that he had no intention of poisoning Toothless, having developed a deep respect for dragons after a Monstrous Nightmare saved him from the cave in. He stays behind to fight off Johann's men with the Skrill to give Hiccup and Toothless time to escape, sacrificing his own life.
