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Ever since Juliet hit the bomb and made it go off we've been wondering what is going to happen on next season's Lost. This could be a clue (and it's a spoiler!)

A former cast member is returning to the show, and her return will make Lost fans come up with many theories, guesses, and scenarios. Emilie De Ravin will return to the show as Claire. And it's not going to be one of those cameos or limited-time deals, she's returning to the show full-time. Which means...well, who knows what it means. Could Claire be alive? A ghost? Evil like fake Locke? Flashbacks?

(S05E03) "Because... he's one of my people." - Locke

I really need to get in the habit of taping my mouth shut while watching Lost because my jaw is always on the floor by the end of every episode. Time-traveling has added an entirely new dimension (literally) to the story-telling techniques of this show and the first three hours of this season have been some of Lost's best. The flash-backs always lacked a certain amount of tension because they already happened. On the flip side of the same coin, the same can be said about the flash-forwards because you know they're going to happen. But time-traveling has created this new ripple where nothing has permanence anymore, whether it happened, is happening, or will happen. This is mesmerizing stuff to watch unfold because everything becomes new the second Faraday, Locke, and Co. make a new jump. They may not be altering the ultimate outcome, but they are altering the moment.

As amazing as Lost is, I still hate it for one tiny reason - every time a new season begins, I get terrified that I won't "get it." If that happened, it would completely deflate my enjoyment of the show. While Lost has had its fair share of WTF episodes, most of them are decipherable after repeat viewings; season five's first two installments definitely fall into that category. It's like playing the sequel of your favorite video game - for the most part, the controls and game-play are the same, but there are enough changes that it still takes you a few hours to get a handle on it.

Ah, Season Four. You were so good to us, even though you were slightly shorted by that pesky writers strike. Lost wasn't as impacted as a lot of other shows because the creators had already gotten the okay to do three shorter seasons before any of this happened. Sure they lost a little bit of time, but not enough to have really impacted the show.

And Season Four gave us such pivotal moments. The introduction of the freighties, including some really good and interesting characters. The return of Michael. The identities of the Oceanic Six. An in-depth examination of what happened to them after the island in more flash forwards. The man in the cabin. Ben moves the island. And the identity of the man in the casket. So much happened in fourteen short episodes, but still that's not enough. To fill out the set, we've got two full discs of extras.

(S04E10) The writers gave us a break after last week's action- and information-packed episode. While Jack struggled with appendicitis, we got another look at his future off the island. Three of the other members of the Oceanic Six turned up, and Jack learned that there's no escaping a love triangle. Back on the island, Claire had an unexpected visitor.

(S04E09) What a brilliant episode! At this point, I think all future Lost episodes should be either Ben-, Sayid-, or Desmond-centric. This episode had it all: tons of action, several big revelations, and more questions to ponder. Michael Emerson gave yet another award-worthy performance this week and showed off his action hero side.

Follow this link to join the chat. The full review is after the jump.

(S04E08) We're going into a five-week Lost hiatus, and I'm extremely thankful that this wasn't the season finale. "Meet Kevin Johnson" wasn't a bad episode, but I couldn't have waited until 2009 for a follow-up. This episode did have its moments. We learned more about the island's connection to its inhabitants, Michael's time on the mainland, and there was (at least) one death. That should keep us busy for the next month or so, right?

(S04E07) Well, that episode was a real tearjerker. This week on Lost, we met a few more members of the freighter crew, Sun had second thoughts about joining Team Jack, and Bernard got a little screen time. We finally got a look at Ben's inside man on the freighter, too. Things are starting to get weird on the freighter, and I'm beginning to wonder if Sayid and Desmond were safer back on the island.

(S04E06) I didn't think it was possible, but the Lost writers actually found a way to make Ben creepier. All they had to do was add a "lovesick stalker" dimension to his personality. For a Juliet-centric episode, it seemed like we learned a lot more about Ben than the intriguing Dr. Burke. We also got some significant answers about who's behind the freighter mission--from Ben, of course. Perhaps the only thing Ben doesn't know is how to have a healthy romantic relationship.

(S04E05) I love Desmond-centric episodes. I never fully understand them, but I love them. Confusing as they are, I believe that they are the key to understanding the island and its unique properties. This was the one of the few Lost episodes this season that didn't flash forward to the future of the Oceanic Six. We didn't get a shocking twist at the end, but we got a lot of new information to consider. It's a relief to know that this season's storytelling won't follow a strict formula. There are so many mysteries, relationships, and settings to explore now; variety is most welcome.

(S04E04) "Eggtown" gave us more answers and another shocking ending; I could really get used to this. This week, we got a closer look at Team Locke's life at the Barracks, caught a glimpse of Kate's future off the island, and got to catch up with the survivors on the beach--remember them? Not many shows could mix topics like blackmail, grenades, and motherhood into one episode, but Lost pulled it off.

(S04E03) Three great episodes in a row! Between "The Economist" and Carlton Cuse's promise to deliver five more episodes, Lost is having a great week. The identity of another member of the Oceanic Six was revealed, and that person is keeping strange company in the off-island future. As usual, each big revelation introduced about a dozen more questions, but that's part of the show's charm.

(S04E02) Watching "Confirmed Dead" was like watching my dream episode of Lost. People asked direct questions for once, some of which were answered within the hour! This episode was all about the Freighties--their lives back on the mainland, their connections to Oceanic 815, and, to borrow a phrase, their "primary objective."

(S04E01) In honor of the Lost season premiere, we're doing a live chat during the 9pm ET airing of the episode. Watch the show and share your thoughts with Lost fans in real time! The full review follows after the jump. In "The Beginning of the End," the 815 survivors' feelings about being rescued were influenced by Charlie's message.

You can still join the chat by following this link. You can also check out AOL TV's coverage of Lost .

(S03E22) In honor of the Lost season finale, tonight we're doing something special. There's going to be a live chat during the show so you can post your comments in real-time! The full review is now posted will be posted in this space later this evening.

What will happen to Locke and Charlie? Will Jack's dynamite plan work, or will Ben and the Others outsmart the 815ers? Will Sawyer take his shirt off?

Click here to join the chat.