DreamWorks Dragons (2012)

S1E16 Defiant One

While caught in a waterspout, Toothless's prosthetic tail gets damaged, preventing him from flying. This mishap leaves him, Hiccup, and Snotlout stuck on Outcast Island. To escape, they must collaborate to fix Toothless's tail, all while navigating the tension between Hiccup and Snotlout. They need to work through their differences and find a way back to Berk before Alvin and the Outcasts can capture them.