Episode Title:The Ultimatum.Episode Description:As the inner city of Ba Sing Se is looted and razed, and riots and fires spread throughout the outer city, Mako and Bolin escape with their family to the Misty Palms Oasis. They tell Korra that Zaheer intends to kill the airbenders at the Northern Air Temple unless she surrenders to him. After speaking to Iroh in the spirit world, Korra uses the Metal Clan's radio to contact Tenzin just as the Red Lotus attacks the Temple. Tenzin resists the invaders with his siblings while the other airbenders attempt to escape. After the defenders are overpowered, the Red Lotus throws Kya and Bumi off the mountain and subdue the exhausted and badly beaten Tenzin.