Frankly, I think killing Jack (or Kate or Charlie) would run them into big problems with the network suits that have spent millions of dollars advertising the show with those three actors' faces featured prominently. Either a Locke or Jack death would probably have the biggest impact in-show, but I doubt either is in the works.
Jayne ,'Jaynestown'
Spoilers 3: First Mutant Enemy, Now the World
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Wrongda's idea of big (size aside) doesn't hold much water, for me. I think she called Tara's death the "Big Scooby Death." Maybe I'm just too pedantic (no, really) but Tara's death, as heartbreaking as it was, was not a big "Scooby" death in my Sunnydale.
I would only define "big" as one of the core 14. Locke's death would have more of an impact on the show IMO than Jack, but I think both of them are safe.
Boone and Claire seem to have the biggest targets on their chests.
Boone could off Shannon. That could be defined as betrayal.
eta: or Shannon could take out Boone for that matter.
Hell, I'd take out Boone, if someone would give me the chance.
Sign me up too. Particularly if I can do it in a way that would be extra-embarrassing to Somerhalder, like having Boone run afoul of a trap made with curare-dipped vibrators or somesuch.
Serial:
Fury apparently said that the actor being killed off was one who had good reason to be back stateside. The Good Morning America interview today said that only one of the actors commutes back and forth to the mainland, with the rest living in Hawaii with family. While they didn't name names on that show, Naveen lives in Los Angeles with Barbara Hershey. And the upcoming Sayid episode is titled "Greater Good."
Anybody care to bet that it'll be right after Sayid has sex with Shannon?
Not Sayid...Noooooooo!
Sex with Shannon is so hot it kills Sayid!?! Nah, maybe she stabs him in the back, like literally.
edit to totally agree with Robin
I'm not too thrilled by the prospect either, but a lot more of the spoilers are clicking into place with him than with any of the other possible candidates. If the "betrayed by an ally" thing is accurate, I assume that would mean that Shannon rather than Boone withholds info that proves fatal.