Overview: Since its discovery a century ago, archaeologists have been trying to unlock the secrets of King Tut's tomb, but many questions remain about whom the crypt was built for. Many of the 5,400 objects found inside seem to be made for a female, but who could this mystery woman be, and what was her relationship to the Boy King? Where do her remains lie? Experts journey to the Valley of the Kings and attempt to answer these puzzling mysteries.