All time best hands down TAS episode from the first season.

[Morgoth]

Whatever your fave is.

For me...Heart of Ice. There's just something about it. Great art, darn good story, and it made me like Mr. Freeze.

Runner up to that one, On Leather Wings.

 

[Hades]

511- IT'S NEVER TOO LATE An aging mob boss, Arnold Stromwell, is about to be rubbed out by a rival boss, Rupert Thorne. Batman saves Stromwell from Thorne's men and keeps the crime boss one step ahead of his enemies. In the process, Stromwell learns his drug dealings have caused his son to end up in a drug rehab center. By the end of the evening, after a reunion with his brother, a priest, and an emotion-wrenching recollection from their childhood, Stromwell turns state's evidence and vows to make amends.




That would have to be my favorite.