There is no "Episode 20" of The Legend of Korra Season 1. The first season, titled Book One: Air , consists of only .
: The villain Amon successfully strips Korra of her ability to bend water, earth, and fire. This strikes at the core of Korra’s character; unlike Aang, who struggled with the responsibility of being the Avatar, Korra defined her entire self-worth through her bending prowess. The Legend of Korra Season 1 Episode 20
In the Season 1 finale , Korra faces her greatest fear as the Equalist revolution reaches its peak. There is no "Episode 20" of The Legend of Korra Season 1