I'll just point out that I really hate the numbering system for this season, but I adhered to it to prevent confusion with the previous episode thread.
Anyway trailers for the next episode:The Canadian one.The US one.
What we know:
This is the final episode until 2009 (arrgh!). Current rumours suggest that the show will be back in early January 2009 though, rather than having to wait all the way until next April.
It's written by Bradley Thompson and David Weddle, who have written some of the show's biggest episodes.
It's directed by Michael Rymer, who's directed most of of the major episodes of the series as well.
David Eick has apparently said that the mid-season cliffhanger, by itself, is as big as New Caprica.
Katee Sackhoff has said they could have finished with either 410 or 411 (or 412/413 using the official production numbers) as the final episode of the whole series. Difficult to see how that tracks with the 'cliffhanger' note above though.
According to other souces, Lee is going to wish he never became president and Cylon forces will hold Roslin prisoner in an attempt to flush the Final Five out of hiding.
There will be more 'webisodes' bridging Seasons 4.0-4.5, suggesting a possible gap of time between the two halves of the season.
From the trailers (do we spoil these or not? Doing it for safety):
[spoiler]Roslin urges Adama to destroy the crippled Cylon basestar.
Tyrol notices that something has 'changed' about Starbuck's Viper. Whether he means since it came back from the Nebula or since the original Viper was destroyed is unclear.
The Penultimate Four are on the hanger deck with two Cylon Centurions in the background.
Tigh tells Adama that he is a Cylon.
Lee punches Tigh. I could be wrong, but I think there's a shot of Adama punching Tigh as well.
Adama also punches a mirror with real anger and heartache.
Tory manages to get onto the Cylon basestar. She tells Roslin she's through taking her orders and is going back to her people. We see Tory on the basestar talking to the other Cylons, who look stunned (guess that Adama doesn't nuke the basestar after all).
Tigh is alone in the launch tube with the doors closing.
However, we then see Tigh, Anders and Tyrol in the launch tube, possibly with their hands tied together.
Starbuck is in her new Viper checking something out. We see an unusual control mechanism (not the DRADIS, looks more like a targeting computer).
Starbuck then races into the launch tube control room just as Lee and Dualla are about to space the Cylons and tells that the three Cylons have just given them Earth.
There is a shot of what looks like Raptors and shuttles decending towards a blue-white planet (Earth?).
Roslin and D'Anna in the rain in what may be a harsh landscape, not looking particularly happy.
Adama having some kind of breakdown in Lee's arms on Colonial One
, talking about all the people he's sent to die.[/spoiler]
Something tells me this isn't going to be this season's 'comedy episode' :eek2: