Would you watch 24 if Jack Bauer wasn't in it? I would have, if he had been replaced by Tony Almeda. But that isn't going to happen now. And as much as I like Renee? Sorry, my left-over sexist viewing habits would never accept a woman in that role.
To me? 24 would lose its way with out Jack. It would be like watching AMERICAN IDOL with out Simon Cowell. Both shows would tank with out them I think.