Avatar: The Legend Of Korra Episode 4 -

This episode is often cited by fans as the moment the series truly finds its darker, more complex tone.

Zaheer and his team of powerful benders infiltrate a Northern Water Tribe prison to free P'Li, a deadly combustion bender. Avatar: The Legend of Korra Episode 4

LoK Rewatch Season 4 Episode 4: "The Calling" : r/legendofkorra This episode is often cited by fans as