A doctor and nurse solve an operating-room murder.
| Actor | Role |
|---|---|
 Bruce CabotDr. Bob Clayton | Dr. Bob Clayton |
 Helen MackCarole Dale | Carole Dale |
 Joan WoodburyLila Haines | Lila Haines |
 Constance WorthAnn Stokes | Ann Stokes |
 Thomas E. JacksonSergeant Macintosh Spencer (as Thomas Jackson) | Sergeant Macintosh Spencer (as Thomas Jackson) |
 Tom DuganHank Manley | Hank Manley |
 Mabel ToddDora Stanley | Dora Stanley |
 Roland DrewDr. Norman Kennedy | Dr. Norman Kennedy |
 Addison RichardsDr. Finley Morton | Dr. Finley Morton |
 Frank ReicherDr. Amos Thornton | Dr. Amos Thornton |
 Frank PugliaTony | Tony |
 Don PorterDr. Donald Fox | Dr. Donald Fox |
| DDee DoddLittle Boy | Little Boy |
 Byron FoulgerThe Coroner | The Coroner |
 John HarmonPete - the Fingerprint Man | Pete - the Fingerprint Man |
 Holmes HerbertHospital Administrator | Hospital Administrator |