Spoiler Alert! If you haven't seen Season Five of "Game of Thrones," stop reading now. Go read this instead: This developer's code saved 'Game of Thrones.'
Fans of HBO's fantasy drama "Game of Thrones" were shocked at the end of the fifth season when Jon Snow was betrayed and stabbed to death.
Many did not understand why the fans' favorite, played by British actor Kit Harington, had to die.
In response to a question posed by CNBC's Carolin Roth at a panel discussion, Bewkes (as well as Mike Fries, CEO of Liberty Global) explains why the best characters in popular TV shows always get killed off.
Watch this video to find out the answer: