The sidebar* to Chuck Klosterman's article in the May Esquire makes some good, troubling points about our favorite show.
For three seasons the ABC series "Lost" used flashbacks to illustrate elements of the narrative the audience never saw. Now they've gone the other way; now they're consistently using flash-forwards to show pats of the story we haven't yet experienced. It's made the series even more interesting than it already was. But something keeps occurring to me: Isn't this a dangerous move on behalf of the producers? They seem to be giving its central cast members the strongest negotiating leverage in TV history.
Let's say the actor who plays Sayid (Naveen Andrews) suddenly decides to ignore his current contract. Let's say he demands twice as much money as he's scheduled to receive and won't show up for work without it. What could ABC possibly do? They can't just feed him to the smoke monster and write him off the show; we already know he definitely exists in an abstract tomorrow. By actively showing the future, the screenwriters have relinquished their ability to control the present. An even greater (and admittedly morbid) problem would be accidental death: What if Michael Emerson (the actor who portrays Ben) died in a car accident? Would the show simply have to end? How could his absence be reconciled? There is no "News Radio" option for "Lost." Not any more.
We could end up with a whole new version of "Bewitched"'s two Darrins or "Roseanne"'s two Beckys.
Or, I guess with the whole time travel angle in play now, they could write someone off and just spin into a new future without the stubborn actor.
Bill, does this still count as having to look at a "Lost" post?
* Not available online.

Where are you people getting time travel from?
The only time travel so far has been the consciousness of Desmond. No one has physically time traveled yet, so I don't think it would solve the problem Klosterman brings up here.
That said, I think these writers are creative enough to solve the problem. All they have to do is create a reason that you don't see that person again until the flash forwards...
Like for example, if Sayid Quits, then have him get locked up in the brig on the ship, and you just never see him again in "present", but you know he shows up later in the flash forwards.
Or if the actor who plays Ben dies, just send the character to the south pole for the remainder of "the present".
Easily solved. These writers are quite creative. :)