A new film series starring Raymond Burr as Robert Ironside
with Don Galloway as Det-Sgt Brown, Don Mitchell as Mark Sanger and Elizabeth Baur as Officer Fran Belding
with guest stars Tim Matheson, Paul Koslo, Barry Higgins, Kathy Lloyd, Collin Willcox-Horn

The gifted but very unpopular leader of a string quartet is found murdered in his study. To find the killer Ironside follows a trail of baffling musical clues recorded on tape - and left by the victim himself.