Editor’s note:  This story includes the discussion of suicide. If you or someone you know needs help, the national suicide and crisis lifeline in the U.S. is available by calling or texting 988. There...

First airing on Nickelodeon in 2005, "Avatar: The Last Airbender" received universal acclaim from critics and love from viewers of all ages. It was praised for its sophisticated plot, complex and well-developed...