Quick recap
After making peace with dragons, Berk has to learn to live with them, and it doesn't always go well: houses catch fire, fish goes missing, and some Vikings, like grumpy old Mildew, want the beasts gone. Stoick lets Hiccup start an academy to train dragons and riders. With Astrid, Fishlegs, Snotlout and the twins, he logs new species in the Book of Dragons. The big threat is Alvin the Treacherous, chief of the rival Outcast tribe, who wants Hiccup's secret to build a dragon army. The season is mostly standalone episodes, with Alvin coming back every so often.
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