That black goo was sure to play a future part in the show, and it did, resulting in the resurrection of Henry. He was convincing to the team, because he always was charming in a pretty dangerous way. But, is Henry TRULY evil, or was there some redemption? Given that he came from the black goo....my money is on his evilness. It's hard to believe there is only one episode left. A 13-episode arc, just like season one started out to be. I hope that we get a fifth season. It's interesting that we get older and younger Molly both in the same timeline. I continue to be impressed at the impression Tom Mison leaves regarding his closeness to Molly, even with the actress playing older Molly. It's very sweet.