Tomorrow, the Book 3 Finale of The Legend Of Korra will be released online. Nick says it will be up on their website at noon EDT, but it should actually be up anywhere from 30 minutes to an hour earlier than that.
I’m not completely sure what URL the finale will be up at since it will consist of two episodes, but this is probably the best bet:
If it is not up here, check the Korra homepage on Nick.com: http://www.nick.com/legend-of-korra/
Here is information on how to improve Nick.com’s player and here is info on how to view Nick.com if you’re outside the US.
In addition, the finale might be up early for purchase on Amazon and Google Play. The last three weeks Korra was up early on Amazon and two weeks for Google Play. Each week it has been on Amazon before Google Play. Last week Korra was up on Amazon at around 4am EDT on Friday. I have been tweeting Nick all week to try to get them to stop this from happening, and I know they are aware of the problem, so this might not happen this week. I haven’t received assurances that it will stop though (there seems to be confusion between departments at Nick on this).