Colonel March is called into investigate the murder of a psychiatrist who had been threatened by the husband of a patient.
Members of the Himalayan Mountaineering Club are threatened by what appears to be an abominable snowman.
March's niece believes in spiritualism so when she hears her dead husband's voice and the sound of him playing the piano she believes he has returned.
A fashion model is found murdered but dressed in mis-matched colors.
The kidnapping of a little boy's pet leads March to a smuggling ring and a stolen diamond.
Colonel March is on the scene when a dead parrot is sent to a man rumored to be guilty of five murders.
A man asks a woman to tell her husband that she wants a divorce; the woman then reports that her husband has fallen off the side of a cliff.
Colonel March's search for a mysterious character known only as Monsieur Z takes him to a waterfront nightclub.
Two Mona Lisa paintings appear on the art market.
Experiments lowering the body's resistance for space travel prove fatal; Colonel March must determine if it's an accident or foul play.
A boy hears what appears to be the voice of his dead father coming from a bust.
In order to solve the murder of an English Lord, Colonel March puts five people under hypnosis.
Colonel March is called to the scene when a murder occurs in a hairdressing salon.
A man is poisoned to death in a cafe right before the eyes of Colonel March and a colleague.
March investigates the murder of a staff member at a scientific research institution and his investigation obstructed.
A husband goes to the police and asks to be locked up -- so that he won't kill his wife.
The leading suspect in a murder is an American who claims he only met the victim once.
The key to the solution of a murder could be a young lad's lost ball.
After a bank robbery, the suspect is followed to his office, but when March and the authorities arrive and search the office there's no trace of the money.
A skull, known as the Damascus Man, is stolen from a museum and someone wants Colonel March off the investigation so they try to kill him.
A 15th century book, rumored to contain black magic, disappears from the safe of a university while on loan to the institution.
A deadly music box.
A phony medium informs Colonel March that she's conjured up real spirit.
A call for help during a dance is the clue Colonel March needs to break a suspect's alibi.
A pair of disembodied gloves appear to kill a man.
When a woman is found dead, Colonel March must determine whether it was suicide or murder; A fencing match holds the vital clue.