Thanks to NickAndMore on Twitter we now have the names of the 4 remaining episodes of Korra.
This Friday's episode K410 is called "Operation: Beifong
K411 is called "Kuvira's Gambit"
K412 is called "Day Of The Colossus"
K413 is called "The Last Stand"
These definitely make sense given that we know we are getting a two part finale on December 19th. We have our Beifong rescue missio next week, K411 seems to be where we will find out Kuvira's final plan and the last 2 definitely seem like finale part 1 and 2.
Thoughts and the final episode titles?