The link probably brought you here, but if you want to find the episodes specifically, here is the episode archive:
WARNING: This is a sneak peek at episode 6. If you really, really hate spoilers, don’t listen to this.
Though, it doesn’t reveal anything about the plot until the very end, and even then it’s fairly vague.
This episode will come along much faster than the last one, that’s a big fat promi-
Derpy: STOP CALLING ME FAT!
…. Right, moving on!