Brian Truitt

USA TODAY

Clear off some shelf space because there's a whole bunch of dragons coming home.

Winged beasts and their riders — like the loyal Toothless and Viking dude Hiccup — return for another adventure in the sequel How to Train Your Dragon 2, which arrives on digital HD Oct. 21 and Blu-ray/DVD Nov. 11.

Writer/director Dean DeBlois' follow-up to the original 2010 Dragon film takes Hiccup (voiced by Jay Baruchel) and his Night Fury pal to different parts of the world where he meets his mom, another Dragon Rider named Valka (Cate Blanchett), but also has to defend the island of Berk from the world-dominating schemes of the evil Drago (Djimon Hounsou).

A featurette on the home-video release features actors such as Baruchel, America Ferrera and Gerard Butler discussing the dynamic between the humans and their dragon counterparts.

"All those characters, they've developed a symbiotic relationship with their dragons," says Blanchett.

"It's a whole new world of dragons," adds Craig Ferguson, who voices the peg-legged Gobber the Belch. "We've only just scratched the surface."

Gobber narrates a piece about Drago's war machines and creature contingent in the extras on the Blu-ray, which also includes a guide to the various dragons, 60-minute making-of documentary, features on the creation of Hiccup and Toothless' flight sequences, Berk and other animated set pieces, kid-friendly "Dragon Races," deleted scenes and an audio commentary featuring DeBlois and fellow filmmakers.

Plus, the set offers Dragons: Dawn of the Dragon Races, a new animated adventure with the movie's voice cast and a tale involving the search for a lost sheep and a heap of dragon sprints.

Meanwhile, DeBlois is hard at work on the concluding chapter of his Dragon trilogy that promises to have even more creatures involved.

"It's a requisite," DeBlois told USA TODAY in the spring. "Everybody wants to see how large the dragon kingdom is, and it would be a disappointment not to reveal a few new species. We'll be scratching our heads wondering where else we can go with these dragons."