Lord John Marbury (Roger Rees), a friend of the President's (and a royal pain in Leo's neck), is appointed Britain's ambassador to the U.S.; Toby and Sam wrangle over an address the President is to give to an environmental group; Leo tries (with no success) to get the President interested in a missile-defense system; and C.J. is enlisted to ask a controversial comedian (Rocky Carroll) to decline an invitation to perform at a dinner the President is to attend.