I didn't see anyone mention this yet. After Stan and Aderholt finished talking, did anyone else hear the mail robot? I watched it twice and to make sure I heard it. I think they were standing in the hallway, not in the safe room, and the robot was in the hallway next to them, altho it wasn't shown. Meanwhile, Oleg and the other Russian woman talk Arkady into keeping Project Zephyr going, which means they will eventually read the conversation between Stan and Aderholt and find out that the bug in the pen was found. Or does the Center already know that. I thought Philip and Elizabeth didn't tell anyone the bug was found.