The Western Air Temple - S3-E12
Other mistake: When Sokka and Aang put Toph's feet into the fountain, Aang's hand (the one holding Toph's left leg) is incorrectly drawn with a blue glove on it. The glove is gone in the next shot. (00:15:29)
Avatar: The Last Airbender (2005)
1 mistake in The Western Air Temple
Starring: Dee Bradley Baker, Mae Whitman, Jack De Sena, Zach Tyler
The Cave of Two Lovers - S2-E2
Iroh: Where are we going to go? We are enemies of the Earth Kingdom, and fugitives from the Fire Nation.
Zuko: If the Earth Kingdom discovers us, we'll be killed.
Iroh: But if the Fire Nation discovers us, we'll be turned over to Azula.
[Iroh and Zuko give each other a meaningful look.]
Zuko: Earth Kingdom it is.
More trivia for Avatar: The Last Airbender
The Ember Island Players - S3-E17
Question: Is there an inside joke or added meaning to the names that worked on the "play"? The "surprisingly informed cabbage merchant" is obvious, but besides that.
Answer: The pirates are from the episodes "The Waterbending Scroll" and "The Waterbending Master" (They're the ones Katara stole the scroll from). The traveling musicians are from "The Cave of Two Lovers. The prisoners of war likely refer to the Kyoshi Warriors, the men of the Southern Water Tribe, and possibly Bumi and the other citizens of Omashu.