Thanks to Zap2it.com we now have full confirmation of the episode title for K103 , It is “The Revelation”.

Korra Title final

http://tvlistings.zap2it.com/tv/the-legend-of-korra-the-revelation/EP015470410004

It will air April 21st at 11am EST

Here is the episode Description

Korra attempts to learn more about the Equalist movement through infiltration.

So this is set up to be a great episode, we will get more on The Equalists after very little focus on them in the first two episodes.