Mignon G. Eberhart

While detective Lance is recouperating in a hospital due to mental stress from work, the head doctor and his patient in room 18 are murdered and $100,000 worth of radium goes missing. With the help of his former sweetheart (played by Ann Sheridan, who also happens to be a nurse in the ward), it is up to Lance to stop the string of murders and recover the missing radium.

When a prominent banker is murdered while on a hunting trip, the dead man's daughter, Gwen Kingery, calls in private eye Lance O'Leary to investigate. No sooner has he started gathering clues than another murder is committed?and another?and another?.The culprit wants to cover up an embezzlement scheme, and there is certainly no shortage of suspects. (allmovie.com)

Grandfather is sick and the family and his lawyer gather around waiting for him to die. When he receives a telegram from his disinherited son, Charles, he passes out and a nurse, Sarah, comes to the house to attend to him. His other two sons, Ross and Adolphe, quarrel over an outstanding loan. Later that night, Adolphe is murdered and the police are called. Everyone is lying and has their reasons. A mysterious man is seen on the property before Grondel, the Butler, is killed. (imdb)

When gangsters threaten the life of the brother of a nurse, she and her superintendent make it look as if he died while a hospital patient. (imdb)

Sue Tally waits for a brother she hasn't seen in twenty years to meet her in a French hotel. By proving her identity, she'll share in a $2,000,000 inheritance. But others are anxious to get a share of the money too, and won't stop at committing a murder or two. (imdb)

Crotchety hospital administrator Peter Melady, self-proclaimed developer of a new wonder anaesthetic, is about to undergo a delicate operation to be performed by the glib Dr. Leo Harrigan, Melady's longtime mutual adversary. Police are called when the murdered body of Harrigan is found in an elevator, and Melady, last seen being wheeled on a gurney to surgery by Harrigan, has disappeared. (imdb)

Bayard Thatcher is blackmailing the family into which he has married. He demands $25,000 by the next night or else he will tell about shady deals and family skeletons. That is the price the bully Bayard demands for leaving the family alone. At Midnight, he is shot and Dr. Carick is called. He has nurse Keating take care of Bayard's superficial wound and watch over him. Later that night, a mysterious person steals the gun under his pillow as he is out arguing with someone. (imdb)

A woman suspected of murdering her fiancée becomes married to a man who is, ironically, the other suspect in the same murder.