Detective Ellery Queen has to solve a series of murders where the victims were killed in numerically descending ages, the male victims were strangled with blue cords and the female victims with pink ones.
Peter Lawford
as Ellery Queen
Harry Morgan
as Insp. Richard Queen
E.G. Marshall
as Dr. Cazalis
Skye Aubrey
as Christy
Stefanie Powers
as Celeste
Coleen Gray
as Mrs. Cazalis
Morgan Sterne
as Police Commissioner
Bill Zuckert
as Sgt. Velie
Bob Hastings
as Hal Hunter
Than Wyenn
as Registrar
Buddy Lester
as Policeman
William Lucking
as Lt. Summers
