This episode was one of the best by far. I don't really see the plot holes at all. Klaus left without his hybrid and doppelganger because he is scared. Damon told him Michael knew where he was. I am guessing he wanted to get the hell out of there. No plot hole there. Klaus guessed after hearing what Matt said to Bonnie about what Vicky told him. Up to that point he was all about killing Elena. It is really hard to imagine that Pearl told Anna about Michael? I think not at all. They were mother and daughter afterall. I am also assuming we find out all about Vicki and Anna.