the legend of korra
The final battle between light and dark commences in 'The Legend of Korra' season 2 finale: 'Darkness Falls' and 'Light in the Dark.'
Team Avatar makes a desperate attempt to stop Unalaq's plans for world domination in 'The Legend of Korra' season 2, episodes 11 and 12: 'Night of a Thousand Starts' & 'Harmonic Convergence.'
Vaatu is on the verge of being released as Korra and Jinora enter a spirit world more hostile than ever in 'The Legend of Korroa' season 2, episode 10: 'A New Spiritual Age.'
With Unalaq joining forces with Vaatu, Korra must find a way to enter the spirit world in 'The Legend of Korra' season 2, episode 9: 'The Guide.'