The Candidate's Wife Affair - S3.E8

Solo and Illya protect Miranda Bryant, the wife of a presidential candidate, from a THRUSH plot to kidnap her, not realizing that she has already been kidnapped and replaced with a double Irina, an unwitting dupe of THRUSH. When they do catch on, the candidate, Senator Bryant and his aide Fairbanks, agree to play along but Fairbanks is the one behind the plot to put a THRUSH agent in the White House.