Hopping around time in a non-linear storytelling fashion (on...

Hopping around time in a non-linear storytelling fashion (on 'Lost') allows you to bring back characters who are dead and, in some cases, buried. Now that time travel is the story itself, it opens up even more doors. So when an actor reads that they're getting killed off on the show, they're basically, like, 'Okay, but should I still bother to show up next week?'