Personally, I never bought the fact that Aiden would attempt to kill Hope. I didn't buy the whole DiMera tie, either, but it looks like I'll have to learn to accept that one. I said long ago that I would be willing to have some crazy story, and one of a look-alike Aiden to fix what I thought was a bad story. I enjoyed the episode and will be glad to have Aiden back, and I hope that this is, indeed, the real Aiden with some redemption of his break from character. We'll see... it will be interesting to see how this all plays out!
Edited to add: I noticed Aiden wasn't wearing his wedding band in his cell. I don't remember him mentioning that it was gone. On second thought, I suppose it would have had to stay with the dead Aiden, but... was just something I noticed.