This episode begins Part IV of our series—The CIA and Covert Empire—by examining the 1953 coup that overthrew Iran's democratically elected Prime Minister Mohammad Mossadegh. We trace the British oil interests that motivated the coup, the Dulles brothers' WWII background that shaped its methods, the operation itself, and the blowback that produced the 1979 hostage crisis and four decades of U.S.-Iranian hostility. We also examine the cases of Kim Philby and Aldrich Ames to il