Day of the Colossus

"URN"

- There are the prototypes back at my office. If we can get those ready to fly, we'll at least be able to offer a little air support.

"Day of the Colossus" is the twelfth episode of Book Four: Balance of The Legend of Korra and the 51st of the overall series. It was released along with "The Last Stand" on Nick.com and through the Nick app on December 19, 2014, and will air on Nicktoons Network the same night.

Overview
Team Avatar clashes with Kuvira on the streets of Republic City.

Synopsis
After Kuvira destroyed the Future Industries warehouse in which Team Avatar, their allies, and Baatar Jr. were in, Bolin saved those inside by stopping a wall from crushing them with his earthbending, lifting it up long enough for them to escape. Tenzin flies to a rooftop and notices Kuvira's giant mecha suit along with a platoon of smaller ones heading across Kyoshi Bridge and flies back to inform the group. Bolin believes that they do not have the strength to match her army and thus suggests allowing her to take the city for now and come back when they were ready. Mako counters by saying that other citizens have yet to be evacuated and if Kuvira sees Wu among them, she might fire her spirit energy cannon again and take them all out. Korra, upset that she could not stop Kuvira from taking Zaofu, told the group that the military leader was a threat to the entire world with her weapon; at that point, Lin returns and states her agreement. They decide to confront Kuvira head-on, though when Varrick mentions that all the hummingbird mecha suits were destroyed, Asami notes that a few of the prototypes were in her office which could help offer air support. Korra tells Suyin to take the wounded to Asami's office while she, Team Avatar, the Air Nation, and Lin take out Kuvira.

Credits
Written by:
 * Tim Hedrick
 * Michael Dante DiMartino

Directed by:
 * Ian Graham
 * Melchior Zwyer

Starring:
 * Janet Varney - Korra
 * David Faustino - Mako
 * P.J. Byrne - Bolin
 * Seychelle Gabriel - Asami
 * J.K. Simmons - Tenzin
 * Zelda Williams - Kuvira
 * John Michael Higgins - Varrick
 * Mindy Sterling - Beifong
 * Logan Wells - Meelo
 * Jeff Bennett - Radio broadcaster

Also starring:
 * Stephanie Sheh -
 * Zhu Li
 * Rohan
 * Sunil Malhotra
 * Wu
 * Mecha-suit #1
 * Anne Heche - Su
 * Maria Bamford - Pema
 * Greg Cipes - Tu
 * Dee Bradley Baker
 * Evacuee
 * Helmsman
 * Earth Empire Captain
 * Pabu
 * Bunny spirits
 * Jim Meskimen
 * Daw
 * Conductor
 * Mecha Suit
 * Daniel Dae Kim - Hiroshi

Series continuity

 * The Future Industries advertisement billboard was previously present as a magazine advertisement in "Reunion".

Trivia

 * This episode, along with "The Last Stand", make up the only two episodes in Book Four to be released together as an hour long special.