Fog
The murders are committed in swift succession on board a liner crossing the Atlantic in a dense fog, and many of the passengers come under suspicion before the actual killer is bought to justice with the aid of a very substantial "ghost."
Mary Brianas Mary FultonDonald Cookas Wentworth BrownReginald Dennyas Dr. WinstayRobert McWadeas Alonzo HoltHelen Freemanas Madame AlvaMaude Eburneas Mrs. JacksonG. Pat Collinsas MullaneyEdwin Maxwellas Ship CaptainSamuel S. Hindsas DickensMarjorie Gatesonas Mrs. BentleyC. Montague Shawas Ship's Doctor