A policeman investigates a woman's link to murders that are preceded by a shrilling horn inside a family mausoleum.
| Actor | Role |
|---|---|
 William 'Stage' BoydLt. Valcour | Lt. Valcour |
 Lilyan TashmanLaura Endicott | Laura Endicott |
 Irving PichelPhilip Endicott | Philip Endicott |
 Regis ToomeyOffice Cassidy | Office Cassidy |
 Sally O'NeilJane, a Maid | Jane, a Maid |
 Blanche FridericiJulia Endicott | Julia Endicott |
 Walter McGrailHerbert Endicott | Herbert Endicott |
 Lester VailThomas Hollander | Thomas Hollander |
 Martha MattoxMiss Roberts | Miss Roberts |
 Frank SheridanChief of Police | Chief of Police |
 Guy OliverWatchman | Watchman |
 Frederick SullivanMedical Examiner | Medical Examiner |