This is the all-Lost edition of morning spoilers. We've got official details about season four, which starts Jan. 31, plus some leaks and some wild, irresponsible speculation, after the jump.

First of all, ABC issued the official press release describing season four:

With only 48 original episodes left until the final episode airs in 2010, this season truly is the beginning of the end with the promise of rescue at hand. Jack has radioed a freighter stationed somewhere off the island. But when it's disclosed that Charlie's dying warning was that these people may not be who they say they are, the castaways are split as to what to do. Jack is convinced that the freighter people are there to rescue them, while Locke is not. A division occurs among the survivors. Who is on the freighter? What was the significance of the flash-forward showing Jack and Kate off the island at some point in the future? What will the consequences be when the characters once again encounter Michael, who seemingly escaped the island after murdering two of the survivors? These are some of the questions "Lost" will explore during the action-packed fourth season.

The band of friends, family, enemies and strangers must continue to work together against the cruel weather and harsh terrain if they want to stay alive. But as they have discovered during their 90-plus days on the island, danger and mystery loom behind every corner, and those they thought could be trusted may turn against them. Even heroes have secrets.

Also, if you haven't seen the extended trailer, check it out now. We'll wait.

On top of that official info, there are some pretty credible spoilers that have leaked out about the new season:

  • Jeff Fahey (Lawnmower Man) will play a character named Frank Lapidus, and Australian actor Grant Bowler also has a guest-star role in an upcoming episode [SpoilersLost]
  • Also, episode two will be called "Confirmed Dead" and will be all about the Freighter People. [SpoilersLost again]
  • Horace Goodspeed and Olivia are key to the backstory of Dharma, while Annie is key to the story of the island, so we'll see those characters again at some point. [TVSquad]
  • As we mentioned, the islanders split into two teams, probably in response to the freighter, and it turns out Juliet will be on Jack's team. [E!Online]
  • At least two characters will die during the eight episodes that have been filmed. [Ask Ausiello]
  • The "Oceanic Six" are the survivors who escape from the island and become semi-famous, including Jack, Hurley, Sayid, Kate, Sun and Jin. [Remote Access]

And then there are some more way-out-there rumors:

  • Episode 7 features a twist that shocked the cast. It's mostly a Jin/Sun-centric episode, featuring flash-forwards, but also contains bad news for Juliet. [BuddyTV]
  • Are there dinosaur bones and dinosaur eggs on the island? [Scoops Magnum]
  • Gavin Park was the latest Lost actor to have a drunk driving incident, and previous DUI castmembers have all seen their characters killed, so his days may be numbered. [CulturePopped]
  • Greg Grunberg, the psychic cop from Heroes, played the pilot of Oceanic 815, and says that character will soon return. [SpoilerGeeks]
  • A "key death" will appear early in season four, but it's a flash-forward and takes place way off in the future. [Lost Rumours]
  • The season opener will begin with a plane crash, which turns out to be a new angle on the Oceanic 815 crash onto the island. [Lost Rumours again]

That's all we have. Except a comment. In the case of Lost, getting off the island could be the equivalent of Battlestar Galactica finding Earth. It could lead to another Galactica 1980, or it could be the startling twist we're all hoping the new Galactica remake will include in its fourth season. It depends on the execution.