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.
Philo Vance
Laurian March (as Terry Austin)
Ernie Clark
Tina Cromwell
Oliver Tennant
Inspector Walsh
Lt. Burke
Geegee Desmond
Roberts
Ellis Mason
Charles O'Mara
Willetts
Guy Harkness
Norma Harkness
Jeffrey Connor
Pat Roberts
Alberto the Costume Designer (uncredited)
