On some digital platforms like Apple TV , "Season 1" is listed as a massive combined collection of both Avatar: The Last Airbender and The Legend of Korra . In this specific numbering system:

Which of these stories were you hoping to find more details about?

However, the number likely refers to the 43rd episode of the overall series , or a specific episode in a combined collection. Based on that, here is the information for the two episodes that most likely match your request: 1. Overall Episode 43: "The Calling"

Tenzin's children—Jinora, Ikki, and Meelo—travel the world to find Korra, who has been missing for years.

Korra challenges Amon to a duel at Aang Memorial Island, only to be ambushed and threatened with having her bending removed.

is "The Painted Lady," which is technically from the original Avatar series (Season 3, Episode 3).

3. If You Meant Season 1, Episode 4: "The Voice in the Night"

If you are counting every episode from the very beginning of the series, is actually Season 4, Episode 4 .