Thanks to Bryan on tumblr we have the schedule for the last 6 episodes of the season.

Book 2 logo

K209 The Guide as we already know will air tomorrow at 8pm EST K210 A New Spiritual Age will air next friday November 8th at 8pm EST K211 and K212 Night of a Thousand Stars and Harmonic Convergence will air together on November 15th at 8pm EST Last but not least Book 2 Finale will be K213 and K214, but titles unknown right now, on November 22nd at 8pm EST So Korra will be at 8pm EST for the rest of the Book which is great and we will get 2 1 hour specials to end the book. - I think the fixed timeslot is a huge positive to take from this, as we speculated they did change from 8:30 to 8 to accommodate any 2 parters, but it does make you wonder what on earth Nick were thinking with the 8:30 timeslot at all. Bryan said that  the last 4 episodes "especially the last four, pack a serious wallop, so those are going to be two incredibly dense, juicy one-hours." So that sounds very much like how I would describe "Beginnings", so I am excited.