Private Detective Philo Vance gets involved with a succession of murders and a mystery concerning the disappearance of an emerald that has been smuggled into the United States.
| Actor | Role |
|---|---|
 Alan CurtisPhilo Vance | Philo Vance |
 Vivian AustinLaurian March (as Terry Austin) | Laurian March (as Terry Austin) |
 Frank JenksErnie Clark | Ernie Clark |
 Tala BirellTina Cromwell | Tina Cromwell |
 Gavin GordonOliver Tennant | Oliver Tennant |
 Cliff ClarkInspector Walsh | Inspector Walsh |
 James BurkeLt. Burke | Lt. Burke |
| TToni ToddGeegee Desmond | Geegee Desmond |
 Francis PierlotRoberts | Roberts |
 Joseph CrehanEllis Mason | Ellis Mason |
| GGarnett MarksCharles O'Mara | Charles O'Mara |
 Grady SuttonWilletts | Willetts |
| CCharles MitchellGuy Harkness | Guy Harkness |
| JJoanne FrankNorma Harkness | Norma Harkness |
| DDan SeymourJeffrey Connor | Jeffrey Connor |
 Karolyn GrimesPat Roberts | Pat Roberts |
| KKenneth FarrellAlberto the Costume Designer (uncredited) | Alberto the Costume Designer (uncredited) |