On the eve of Zoey's commencement, Bartlet fills in the staff on his role in a covert killing after five alleged terrorists go missing, pushing C.J. into a deal with Danny to keep the truth buried. Meanwhile, a new Secret Service agent (Taye Diggs) is assigned to protect the graduate, who clears the air with Charlie before pulling her own unsettling vanishing act; and Andy breaks bad news to a hopeful Toby minutes before her water breaks.