Who stole the ruby red slippers from The Wizard of Oz? Watch our exclusive clip as Expedition Unknown’s Josh Gates gets on the case On Discovery series Expedition Unknown, Josh discovers that the robust looking outside security door had its alarm disabled. This allowed the thieves to break the glass and enter the building. The door to the main museum area was left unlocked, again allowing easy access for the robbers. They then simply had to walk to the display and smash the glass to get their hands on the slippers. A CCTV camera directly opposite the slipper display should have caught the thieves on film, but it was switched off!