When a husband threatens to kill his wife's analyst, and the doctor is found dead, Colonel March is called in to investigate.

Colonel March's niece, a believer in spiritualism, thinks she hears her dead husband's voice, and the sound of his piano playing. Has he returned ?

A fashion model is found dead, but dressed in mismatched colors.

Someone leaves a footprint of the Abominable Snowman on a ledge outside Colonel March's office

The search for the mysterious ""Monsieur Z"" takes Colonel March to the waterfront nightclub, the Chez Marius.

Two Mona Lisa paintings appear on the Art market. But which one is the second original and which is the copy?

A scientist's experiments with lowering the body's resistance for space travel proves fatal. Accident or foul play?

A boy hears the voice of his dead father, coming from a bust, telling him to kill.

Colonel March hypnotizes five people to solve the murder of Lord Telford.

Colonel March is called in to investigate a murder in a hair dressing salon.

A man is poisoned in a cafe before the eyes of Colonel March and Inspector Goron

A scientist's substituted monkey and his subsequent murder are a case for Colonel March.

A husband goes to the police asking to be put in jail before he can kill his wife.

An American is accused of killing a man he claims he only met once.

A little boy's lost ball is a key to a possible murder.

A bank robbery takes place. The suspect, never out of sight, is followed to his office, where he locks himself in. But when the police and Colonel March search his office there is no trace of the money !

A skull, known as the Damascus man, is stolen from a museum. Why? And who is so serious about wanting to stop the investigation that they try to kill Colonel March?

A book from 1437, said to contain black magic, disappears from the safe of a University where it is on temporary borrow.

An empty musical box is left to an heir. Is there more to it than meets the eye?

A phony fortune teller comes to Colonel March when she seems to be truly able to conjure up spirits

A call for help during a Javenese dance is the clue that Colonel March needs to prove a faulty alibi.

A pair of disembodied gloves kill a man. Truth or optical illusion?

A woman is found dead. Suicide or murder? A fencing match proves to be the telling clue.

A dead parrot, sent to a man supposedly guilty of five murders, brings Colonel March onto the scene.

When Colonel March is called in to investigate the kidnapping of a little boy's pet, it leads him to a smuggling racket, and a stolen diamond.

Stanley Rune supposedly fell off a cliff and was killed. Or was he? Is there now a ghost at Cliffside House?