Aired: 1/2/1958
A man hires Diamond to investigate an outer space society which he suspects is out to bilk his rich uncle since they have talked him into leaving the society $100,000 in his will.
Aired: 1/9/1958
Diamond is hired to protect a lady politician whose supporters fear she may be kidnapped by the opposition.
Aired: 1/16/1958
Diamond is hired to track down a gang of safe crackers and recover the money that they stole.
Aired: 1/23/1958
A man convicted of a jewel theft years earlier still claims to be innocent even though the jewels start to show up on the black market as soon as he is released from prison.
Aired: 1/30/1958
Diamond is hired to investigate a fire in a fur shop which killed an accountant who was working there.
Aired: 2/6/1958
A veteran journalist and a recovering alcoholic join forces in order to get a story on a protection racket.
Aired: 2/13/1958
Diamond uncovers a protection racket when he decides to learn why a pair of his Chinese friends unexpectedly call off their upcoming wedding.
Aired: 2/20/1958
A cowboy performing in a Madison Square garden rodeo comes to Diamond for help after he discovers his saddle strap cut and suspects that someone is trying to kill him.
Aired: 2/27/1958
While taking a break from an all night drive at a roadside cafe, Diamond meets a woman who gives him a look convincing him she is afraid of something.
Aired: 3/6/1958
Diamond is beaten and rendered unconscious by a man he suspects is an art thief. When he recovers he discovers that a beautiful woman has subdued his attacker.
Aired: 3/13/1958
Diamond is hired by a woman to clear her son of charges of murder, since he is a member of a gang which robbed a liquor store and killed the sales clerk.
Aired: 3/27/1958
A jewelry store owner comes to Diamond for help when one of his employees refuses to return gems he had been assigned to clean unless he is given a large cash stipend.
Aired: 4/10/1958
Diamond goes under cover as a truck driver in order to investigate a truck hijacking in which the driver was killed.
Aired: 4/17/1958
Diamond sets out to find the man who is trying to kill him and who failed in his last attempt, leaving an innocent bystander dead.
Aired: 4/24/1958
Diamond fails in his efforts to protect a shady night club owner who believes that someone is out to kill him.
Aired: 5/1/1958
While investigating the death of an investment counselor, Diamond learns that a letter has recently been stolen from the deceased's attorney.
Aired: 5/8/1958
Diamond is hired by a singer who finds himself being threatened by extortionists.
Aired: 5/22/1958
Diamond and his client are kidnapped by gangsters who threaten to kill both of them unless Diamond reveals the location of valuable paintings from another case.
Aired: 5/29/1958
Diamond is called upon to investigate the murder of a film producer and upon arriving at the scene of the crime learns that the police have not been notified of the man's death.
Aired: 6/12/1958
After a policeman friend of Diamond's is killed while on patrol, Diamond decides to do an investigation of his own to insure that the killer is brought to justice.
Aired: 6/26/1958
Diamond uncovers a narcotics smuggling operation while investigating the murder of an art restorer who was killed in his workshop.