If you ask any Race to the Edge fan what makes Season 4 great, they will give you one name: .

The central pillar of Season 4 is the psychological warfare between Hiccup and Viggo Grimborn

For a TV budget, Race to the Edge Season 4 punches above its weight. The character models are slightly stiffer than the films, but the lighting engine got a massive upgrade this season. The "Bewilderbeast glacier" scene uses subsurface scattering (light passing through ice) that looks theatrical.

: A massive Titan Wing sea dragon capable of firing long-range explosive blasts from its back.

In the episode "Blindsided," a powerful lightning storm leads to an injury that leaves Astrid temporarily blind. The vulnerability of the situation forces the two to finally acknowledge their feelings, marking a major turning point for their characters.