Cold Opendragons: The Nine | Realms : Season 4 Ep...

Breaking the Ice: A Closer Look at Dragons: The Nine Realms Season 4, Episode 1

While the human Riders are quickly fooled by his sob story, the dragons—led by Thunder—aren't as easily convinced. The tension peaks when: Cold OpenDragons: The Nine Realms : Season 4 Ep...

The episode opens with the Riders stumbling upon the entrance to the Ice Realm, a stark departure from the fiery and crystalline environments we’ve seen previously. While the group is eager to explore this "brand-new, frosty" world, the icy terrain brings more than just cold weather—it brings back a familiar face with a dangerous agenda. The Return of Buzzsaw Breaking the Ice: A Closer Look at Dragons:

Beyond the action, "Cold Open" sets up a season-long theme of obsession. We see Tom struggling with his determination to open the Viking puzzle box, a drive that mirrors Buzzsaw's own unhealthy fixation on dragons. Meanwhile, Olivia's scientific curiosity at Project ICARIS is leading her dangerously close to the truth the kids are trying to hide. Why it Matters The Return of Buzzsaw Beyond the action, "Cold

This premiere effectively raises the stakes for Season 4. It establishes Buzzsaw as a persistent, season-long threat and introduces environmental hazards like "snowcanoes" and blizzards that will push the Riders to their limits in upcoming episodes. The Nine Realms, Season 4 | How to Train Your Dragon Wiki

Thunder outsmarts him, leading to a chase that results in a massive rockfall of crystals.

The highlight of "Cold Open" is the return of Leonard "Buzzsaw" Burne (voiced by Haley Joel Osment). In a classic "Wounded Gazelle Gambit," Buzzsaw disguises himself as an injured hiker who supposedly fell into the realm by accident.