20 Mind-Blowing Facts You Never Knew About Lost
15. Michael Keaton Was Almost Jack...
Of course, Jack wasn't originally meant to have an episode count greater than one. To cement Lost's place as a shocking, unpredictable show, the monster was meant to kill him instead of the pilot in the series opener.
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To up the shock factor, Michael Keaton was cast as Jack; how could this plucky young show kill off such a big actor so flippantly? ABC didn't like the idea of the character fans were most interested in being offed, so the writers changed the victim, much to Keaton's distaste. He didn't fancy being part of a long running show so left, making way for Matthew Fox and a much more proactive, alive Jack.