Famed detective and crime novelist Ellery Queen solves a case involving the suspicious death of a rich man whose inheritors fight over his estate.
| Actor | Role |
|---|---|
 Ralph BellamyEllery Queen | Ellery Queen |
 Margaret LindsayNikki Porter | Nikki Porter |
 Charley GrapewinInsp. Queen | Insp. Queen |
 James BurkeSgt. Velle | Sgt. Velle |
 Michael WhalenDr. James Rogers | Dr. James Rogers |
 Marsha HuntBarbara Braun | Barbara Braun |
 Fred NibloJohn Braun | John Braun |
 Charles LaneDr. Prouty | Dr. Prouty |
 Ann ShoemakerLydia Braun | Lydia Braun |
 Marion MartinCornelia | Cornelia |
 Douglas FowleyRocky Taylor | Rocky Taylor |
 Morgan WallaceZachary | Zachary |
 Byron FoulgerAmos | Amos |
 Katherine DeMilleValerie Norris | Valerie Norris |
| PPeter BronteDoctor's Assistant (uncredited) | Doctor's Assistant (uncredited) |
 Jack CheathamDesk Sergeant (uncredited) | Desk Sergeant (uncredited) |
| AArthur MillettElevator Guard (uncredited) | Elevator Guard (uncredited) |
 Frank O'ConnorAmbulance Driver (uncredited) | Ambulance Driver (uncredited) |
 Lee PhelpsFlynn (uncredited) | Flynn (uncredited) |
 Jack RiceRogers' Assistant (uncredited) | Rogers' Assistant (uncredited) |
 Alan LaddElevator Passenger (uncredited) (unconfirmed) | Elevator Passenger (uncredited) (unconfirmed) |