I wrote a piece for WhatCulture about the last minute changes that saved great TV shows.
Would you have watched Lost if Jack had died in the pilot? Frasier if the pompous radio host was a housebound, paraplegic newspaper magnate?
Read the full article here to find out what the shows you love almost looked like.
(Oh, and this was an article I got a lot of heat for on Twitter from Taylor Lautner fans for a throwaway line in the intro)