Yes . . . yes he is. I paid attention to the voice credits for Avatar once and was blown away to see his name. I didn't believe it so i went here [link] on imdb.com to check and still didn't quite believe it. The next time I saw an episode with Zhao in it, I paid extra special attention to his voice . . . and nearly had a coronary, for indeed it is the one and only Jason. No. Joke.