Fess Parker as Eugene Smith, an honest but unsophisticated U.S. senator from an unidentified small-populated state. According to the story line, Eugene Smith is elected to a Senate vacancy after the death of an incumbent. The series also features Sandra Warner as Parker's wife, Pat Smith; country music singer Red Foley as the senator's Uncle Cooter, Rita Lynn as Smith's secretary, Miss Kelly, and Stan Irwin as Smith's chauffeur, Arnie.