Several days after one of his company's dams burst, ruining the life savings of several investors, a shady power company president is found stabbed to death. Ellery Queen gets to the bottom of the mystery.
| Actor | Role |
|---|---|
 Ralph BellamyEllery Queen | Ellery Queen |
 Margaret LindsayNikki Porter | Nikki Porter |
 Charley GrapewinInsp. Queen | Insp. Queen |
 Spring ByingtonCarlotta Emerson | Carlotta Emerson |
 H.B. WarnerRay Jardin | Ray Jardin |
 James BurkeSgt. Velie | Sgt. Velie |
 Douglass DumbrilleJohn Matthews | John Matthews |
 John BealWalter Matthews | Walter Matthews |
 Linda HayesMarian Jardin | Marian Jardin |
 Sidney BlackmerAnthony Rhodes | Anthony Rhodes |
 Walter KingsfordHenry (Jardin butler) | Henry (Jardin butler) |
 Honorable WuLee (Matthews butler) | Lee (Matthews butler) |
 Charles LaneDr. Prouty (coroner) | Dr. Prouty (coroner) |
 Charles HaltonRufus Smith (auctioneer) | Rufus Smith (auctioneer) |
 Arthur Q. BryanBook salesman | Book salesman |