A convicted thief in Dartmoor prison hides the location of the stolen Bank of England printing plates inside three music boxes. When the innocent purchasers of the boxes start to be murdered, Holmes and Watson investigate.

While watching from her train window, Nikki Collins witnesses a murder in a nearby building. When she alerts the police, they think she has read one too many mystery novels. She then enlists a popular mystery writer to help her solve the crime on her own, but her sleuthing attracts the attentions of suitors and killers.

Jean Preston is determined to find her fiancée, Greg Jones, who went on a safari and didn’t come back when expected. She travels to Akbar, India with Greg’s father, Colonel Jones, Wayne Monroe and the Professor. She asks about Jones at the front desk of the hotel where she stays.

Imprisoned during the Spanish Civil War, John "Kit" McKittrick is released when a New York City policeman pulls some strings. Upon returning to America, McKittrick hears that a friend has committed suicide, and he begins to smell a rat. During his investigation, McKittrick questions three beautiful women, one of whom has a tie to his refugee past. Pursued by Nazi operatives, McKittrick learns of the death of another friend, and begins to suspect the dark Dr. Skaas.

Society sleuths Nick and Nora Charles investigate a murder in a jazz club.

Losing his memories of the last few days, neurologist Dr. Steele is told that his wife has been brutally murdered. Steele, aware of his conniving wife's infidelity, believes he may have been the killer and enlists the aid of his pretty nurse Stella to hypnotize him into recovering his lost memories.

A shortage of zoo animals after World War II brings beautiful animal trainer Tanya, her financial backer and her cruel trail boss to the jungle. After negotiating a quota with the native king, they take more animals than allowed. Tarzan intervenes.

A woman plots to steal secrets from her Atomic-expert husband.

A young girl's parents are killed on a tropical island, and the girl is raised and protected by the jungle animals. When she is found, as a grown woman, she is taken back to the United States to claim her inheritance. There are several people, with vested interests, who stand to gain something if she is shown not to be the missing heir.

In 1942, a young paratrooper in the RAF returns to Czechoslovakia to encourage his fellow countrymen to sabotage the German war effort.