Great point. I completely forgot about the Iranian agents that have "vanished". That does make this somewhat dicier - especially if those agents have assumed room temperature.
They haven't "vanished"! They are sitting comfortably in a cozy chair, sipping sweet tea (or Scotch - depending on their preference), chatting with friendly members of MI5, the CIA or Mossad....or all three. They are very safe because they are in a "safe" house.
They are there because they are smarter than their contemporaries who are sitting in Tehran - waiting for hellfire!