After making a critical public statement about Saudi Arabia, C.J. receives a serious death thread leading Bartlet to assign Secret Service protection to her. While Sam is busy working out the details of the President's upcoming summit with the new Russian President, satellite photographs show an Iranian nuclear facility built with the help of Russian technology. Meanwhile, Charlie works to find out the source of an encoded letter sent to the President; and Toby debates whether or not to let a controversial Russian reporter attend the upcoming summit.