Charlie discovers a scheme for the theft of government radar plans while investigating several murders.

A scientist working on an important new invention which will protect Allied shipping from U-boat torpedoes has been assigned Secret Service security protection. Amazingly, despite the fact that his laboratory and experiments are located on the upper floor of his Washington mansion, he decides to host a cocktail party for friends on the first floor. Even though several of his guests are foreign nationals with shadowy pasts, he refuses to allow his bodyguards to attend because their presence might offend them. When he is killed by unknown means before joining them, the resultant summary investigation includes Honolulu detective Charlie Chan and children Tommy and Iris, later joined by Birmingham Brown, the chauffeur of one of the guests. When a preliminary autopsy reveals the scientist was electrocuted, Charlie and his associates must decide which of the suspects and red herrings is the guilty party. Written by Gabe Taverney (duke1029@aol.com)

Eccentric scientist Harper lives in a spooky mansion with all the trimmings: hidden lab, secret panels, inscrutable butler, and greedy relatives with unusual talents. When Harper seems to be murdered, Charlie Chan (with the uninvited help of No. 4 son) tries to answer such questions as Where's the body? How can a dead man walk? And how can a secret murder be done in full view of detectives and witnesses? Written by Rod Crawford

Charlie and son Jimmy visit an exotic Rio nightclub in the company of local police chief Suoto in order to arrest nightclub chanteuse Lola Dean, whom Charlie believes killed her paramour a year earlier in Honolulu after discovering that he was married. Rather than cause a public scene, the always discreet Chan decides to wait until she gets home. By the time the minions of the law arrive, they find the singer has been stabbed to death, her jewels stolen, and a bevy of clues seemingly planted at the crime scene. Among the suspects are the singer's companion, an ex-husband, a Dean friend along with her boyfriend, an amateur sleuth, her rich playboy fiancée, a rival for his affections, a mind-reading mystic, and, of course, the butler. Written by (duke1029@aol.com)

Thomas P. Manning, businessman and chess expert mysteriously shot in a locked room, dies clutching some chess pieces. Police are baffled, and finally abandon the case. Six months later, victim's daughter Leah Manning, stung by a scurrilous book about the case, enlists the aid of Charlie Chan and Number 3 Son. Additional murders follow, leading to a climactic confrontation in a seemingly deserted Fun House. Written by Rod Crawford

A treasury agent on the trail of counterfeit money confides to fellow ocean liner passenger Charlie Chan that there have been two attempts on his life.

On a cruise ship from Honolulu to San Francisco, the famous Chinese detective encounters four more murders while trying to figure out the murder of a Scotland Yard friend. Written by Ed Stephan

Because Charlie Chan plans to return to Honolulu, he no longer needs the services of Birmingham, who gets a job as butler for William and Justine Bonner, two apparently phony psychics who regularly host occult activities in their home. When Charlie's pretty daughter Frances attends a séance out of curiosity, Mr. Bonner is shot, and she becomes an immediate suspect. Charlie postpones his trip home to help with the investigation, which is made problematic when no bullet can be found in the wound and a hypnotized Mrs. Bonner is compelled to commit suicide by jumping off the roof of a downtown building. Written by duke1029

Coincidence like ancient egg, leave unpleasant odour. Canary unlike faithful dog, do not die from sympathy. Number 2 son very promising detective, promise very much, deliver very little. Nut easy to crack if nut empty. Number 2 son like interest on mortgage, impossible to escape. Fresh weed better than wilted rose. Happy solution never see light if truth kept in dark. One man with gun have more authority than whole army with no ammunition. Door of opportunity swing both ways. Wishful thinking sometimes lead to blind alley. Same leopard can hide beneath different spots. Confidence of son like courage of small boy at dentist, most evident after tooth extracted. Written by Alan Smithee

Paul Manderley, eccentric historian, and his wife, descendant of the Borgias, live in an isolated castle-like mansion in the Mojave Desert. When a guest suddenly collapses, Charlie Chan is invited to stay. As the standard mystery-mansion props come into play, and all means of outside communication are sabotaged, it becomes evident that one of the inhabitants has access to poisons and is prepared to use them... Written by Rod Crawford

Mary Whitman has gone to Reno to obtain a divorce. While there she is arrested on suspicion of murdering a fellow guest at her hotel (which specializes in divorcers). There are many others at the hotel who wanted the victim out of the way. Charlie comes from his home in Honolulu to solve the murder. Written by Ed Stephan