Blackie is implicated in a murder when he accidently sells a phony Charles Dickens first edition at an auction.
| Actor | Role |
|---|---|
 Chester MorrisHoratio 'Boston Blackie' Black | Horatio 'Boston Blackie' Black |
 Lynn MerrickConstance Gloria Mannard | Constance Gloria Mannard |
 Richard LaneInsp. John Farraday | Insp. John Farraday |
 Frank SullySgt. Matthews | Sgt. Matthews |
 Steve CochranJack Higgins | Jack Higgins |
 George E. StoneThe Runt | The Runt |
 Lloyd CorriganArthur Manleder | Arthur Manleder |
 George M. CarletonWilfred Kittridge | Wilfred Kittridge |
 Edward KeaneDoctor | Doctor |
 George LloydDiz | Diz |
 George MeaderSteven Cubaker | Steven Cubaker |
 Jack RiceMr. Obie | Mr. Obie |
 Douglas WoodAlexander Harmon | Alexander Harmon |
| DDan StowellLeslie Paisley | Leslie Paisley |