What episode of Avatar the Last Airbender does Zuko gets caught in a blizzard?

Zuko gets caught in a blizzard in "The Siege of the North, Part 2: The Spirit World", the 19th episode of Season 2 of Avatar: The Last Airbender.

This happens after Zuko and Katara travel to the Northern Water Tribe to find the spirit water that can heal Katara's mother. They get separated in the blizzard, and Zuko ends up being rescued by a group of Northern Water Tribe warriors.