When a famous fashion designer is found murdered, Inspector Richard Queen of the NYPD is baffled by her dying clue, prompting him to bring in his son, mystery writer Ellery Queen, to help in the investigation. This was the pilot film for the short-lived TV series.
| Actor | Role |
|---|---|
 Jim HuttonEllery Queen | Ellery Queen |
 David WayneInsp. Richard Queen | Insp. Richard Queen |
 Ray MillandCarson McKell | Carson McKell |
 Kim HunterMarion McKell | Marion McKell |
 John HillermanSimon Brimmer | Simon Brimmer |
 John LarchDistrict Attorney | District Attorney |
 Tim O'ConnorBen Waterson | Ben Waterson |
 Nancy KovackMonica Gray | Monica Gray |
 Warren BerlingerEddie Carter | Eddie Carter |
 Monte MarkhamTom McKell | Tom McKell |
 Gail StricklandGail Stevens | Gail Stevens |
 Tom ReeseSgt. Thomas Velie | Sgt. Thomas Velie |
 Victor MohicaRamon | Ramon |
 Dwan SmithCora Edwards | Cora Edwards |
 John FinneganMatthew Thomas Cleary | Matthew Thomas Cleary |
| RRosanna HuffmanRadio Actress | Radio Actress |
 Jimmy LydonActor | Actor |
 Basil HoffmanFingerprint Expert | Fingerprint Expert |
 Ross ElliottJudge | Judge |