This episode shows why Avatar is the best kids show ever and imo the best animated show ever. The writing is on par with shows like Dexter and Breaking Bad yet it's a kids show. I doubt I'll ever watch a kids show that makes me connect to the characters more than ATLA
The episode is fantastic because it tells both sides of the fire nations back story from the perspectives of both Fire Lord Spain and Avatar Roku. Also it has the fantastic twist at the end that I won't say but wow! Easily a 10/10 if I could give it a higher rating I would.