Mannix searches for clues when someone tries to kill a former opera star (Nancy Kovack) on the verge of coming out of retirement.
#155 - S7E9 - November 11, 1973
Only the first two seasons of Mannix are on Uncle Earl's.
A native of Flint, Michigan, Nancy Kovack was a student at the University of Michigan at 15, a radio deejay at 16, a college graduate at 19 (Two years before I did!) and the holder of eight beauty titles all by 20.
She was Emmy-nominated for her role in this episode.
She has appeared in Star Trek ("A Private Little War") , The Invaders ("Task Force"). and Perry Mason ("The Case of the Badgered Brother").
there doesn't seem to be anything here