The F.B.I. was Quinn Martin Productions's longest running series. It was unique as its stories were loosely supervised by at the time, current FBI director J. Edgar Hoover himself who watched over the presentation of proper bureau procedure. After each week's episode, Efrem Zimbalist Jr. would step from behind the part of Inspector Erskine and directly address the audience, asking for help to catch real criminals that were on the run.
September 1965 - May 1966
September 1966 - April 1967
September 1967 - April 1968
September 1968 - March 1969
September 1969 - March 1970
September 1970 - March 1971
September 1971 - March 1972
September 1972 - April 1973
September 1973 - April 1974