Supporting cast members included Lucille Benson as Birdie Huff, Charley Pride as R.B., and Dianne Sherrill as Rollie.
"Stoney" Huff – a farmer running a 200-acre spread outside Nashville – is portrayed as a tough, old school cop who plays fair, regardless of the stature of the criminal, and fights crime his own way.
Mayne, however, is seen as a redneck officer who, in an attempt at country music stardom, pitches his songs to the myriad celebrity entertainers he encounters.
Guest stars included Chet Atkins, Ned Beatty, Pat Hingle, Don Johnson, Johnny Paycheck, Jeannine Riley, Ray Stevens, Mel Tillis, Sharon Wyatt (in her first TV appearance), and Tammy Wynette.
Episodes of Nashville 99 were directed by Lawrence Dobkin, Don McDougall, and George Sherman, and written by Ron Bishop and Jimmy Sangster.