I thought last week's episode, "What Kate Does", better than many have given it credit for. Tonight's episode of Lost, "The Substitute", was all-around solid and oughtta placate darn near everybody. 'Twas great to see the dynamic between Sawyer and Locke again (even though Sawyer knew pretty much immediately that it wasn't the real Locke). I think that tonight's show also answered many questions about the lists and the numbers (even though we still don't know what the numbers are supposed to mean).
One thing that's starting to bug me though is the deal about the "flashsideways". We're three episodes into the final season and we barely know anything about what's going on with them. Hope this starts to get addressed soon.
I'll give "The Substitute" an 8.5 out of 10. And I might even resolve that higher the more I think about it.