While I don't follow a lot of television shows, I have watched "The Good Wife" from the beginning. Although Will Gardner had many character flaws, he was often endearing and likeable. He helped make the show one of the most popular on television. So why did the writers mess with a winning combination? I've read that Josh Charles who played Will wanted to leave the show. Couldn't the writers have sent him off somewhere, leaving the hope and the possibility of a return?
Killing off popular characters appears to be a trend. Last fall, the writers of "Person of Interest" put a violent end to Agent Carter. She was another favorite of mine who made the show click on many levels. Other characters have stepped up in importance to take her place, but the show is not the same with Carter gone.
My own books feature danger and sometimes murder, but I have yet to kill off one of my main characters. Years ago, my first novel, Hearts Across Forever, featured Obeah, a type of folk magic and religious practice brought to the West Indies from West Africa. The white witch of Rose Hall in my story learned the practice in Haiti and used it with the slaves who worked on her plantation. Part of that practice harmed cats. My cat-loving readers were upset with me. I decided to never again involve the death of a cat in my writing. Killing a main character would be worse.
Who next, I wonder, in the popular TV series world? I don't want to even think about it.