Episode 1
The Space Society
1958-01-02 • 30 min
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.

TV season
1958-01-02
Episode 1
1958-01-02 • 30 min
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.
Episode 2
1958-01-09 • 30 min
Diamond is hired to protect a lady politician whose supporters fear she may be kidnapped by the opposition.
Episode 3
1958-01-16 • 30 min
Diamond is hired to track down a gang of safe crackers and recover the money that they stole.
Episode 4
1958-01-23 • 30 min
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.
Episode 5
1958-01-30 • 30 min
Diamond is hired to investigate a fire in a fur shop which killed an accountant who was working there.
Episode 6
1958-02-06 • 30 min
A veteran journalist and a recovering alcoholic join forces in order to get a story on a protection racket.
Episode 7
1958-02-13 • 30 min
Diamond uncovers a protection racket when he decides to learn why a pair of his Chinese friends unexpectedly call off their upcoming wedding.
Episode 8
1958-02-20 • 30 min
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.
Episode 9
1958-02-27 • 30 min
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.
Episode 10
1958-03-06 • 30 min
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.
Episode 11
1958-03-13 • 30 min
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.
Episode 12
1958-03-27 • 30 min
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.
Episode 13
1958-04-10 • 30 min
Diamond goes under cover as a truck driver in order to investigate a truck hijacking in which the driver was killed.
Episode 14
1958-04-17 • 30 min
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.
Episode 15
1958-04-24 • 30 min
Diamond fails in his efforts to protect a shady night club owner who believes that someone is out to kill him.
Episode 16
1958-05-01 • 30 min
While investigating the death of an investment counselor, Diamond learns that a letter has recently been stolen from the deceased's attorney.
Episode 17
1958-05-08 • 30 min
Diamond is hired by a singer who finds himself being threatened by extortionists.
Episode 18
1958-05-22 • 30 min
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.
Episode 19
1958-05-29 • 30 min
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.
Episode 20
1958-06-12 • 30 min
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.
Episode 21
1958-06-26 • 30 min
Diamond uncovers a narcotics smuggling operation while investigating the murder of an art restorer who was killed in his workshop.