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34 Episodes 1959 - 1960
Episode 1
Sun, Feb 15, 195930 mins
Race car driver Larry Forsythe misses a race and his mother hires Diamond to investigate. She thinks he's missing. When he turns up dead, Diamond and Forsythe's girlfriend join forces to find out if it was an accident or not.

Episode 2
Sun, Feb 22, 195930 mins
An old man dies alone in his shack on the beach and $84,000 is found among his pile of junk. A hopeful heir hires Richard Diamond to find out if the man is his second cousin. Diamond uncovers evidence that the old man was murdered.
Episode 3
Sun, Mar 1, 195930 mins
Mobster Joey Kane is a marked man. There's been an attempt on his life so he decides to blow the whistle on the mob operation and turn state's witness. He hires Richard Diamond as his go-between with the police.

Episode 4
Sun, Mar 8, 1959
Richard Diamond is hired to find a woman who is living in exile in America, a woman who's opposed to the dictator of her South American country. Diamond isn't sure who he can trust.
Episode 5
Sun, Mar 15, 195930 mins
McAllister, a former police captain from Diamond's New York days, comes to him for help on a case. They weren't exactly friends in the old days. But Diamond agrees to help because of McAllister's daughter, Marilyn Ann, whom he remembers as a 9-year-old girl. McAllister has been hired by a wealthy woman to find her son's killer. Her son was a nasty man with no friends who cared only about money and had few other interests - "blintzes, bourbon and broads" as his mother told Diamond. Even his mother only wanted to hire a private detective to prove that she's not the killer.
Episode 6
Sun, Mar 22, 195930 mins
Diamond is hired to find an art dealer who went to Mexico and has seemingly disappeared.
Episode 7
Sun, Mar 29, 195930 mins
Diamond is hired by a man to find a missing wife. The man's father is the wealthy and powerful Mr. Harding Sr., an invalid in a wheel chair who thinks the woman married his son for his money and for the opportunity to stay in this country.
Episode 8
Sun, Apr 5, 195930 mins
Diamond mixes business with pleasure while on a date at Marineland of the Pacific. He's hired to find a man and the package he was carrying when he disappeared.

Episode 9
Sun, Apr 12, 195930 mins
Diamond investigates a robbery at a charity ball.
Episode 10
Sun, Apr 19, 195930 mins
Two brothers inherit some orange groves when their father dies. Their partner in the company is recently engaged to a much younger woman. The brothers don't trust her and hire Diamond to investigate her.
Episode 11
Sun, May 3, 195930 mins
An art dealer asks Diamond to make a clandestine investigation into the disappearance of a valuable crown which vanished from a safe on board a yacht.
Episode 12
Sun, May 10, 195930 mins
A jukebox operator asks Diamond for help when he is threatened by racketeers who want him to use their records exclusively.
Episode 13
Sun, May 17, 195930 mins
Episode 14
Sun, May 24, 195930 mins
Diamond meets with a new client, Winifred O'Hara, who says she needs protection from a former friend who tried to kill her that night, a man who walks with a limp. While Diamond goes outside to check out what sounds like a prowler, Winifred is murdered inside the house. The police suspect Diamond. He makes a run for it and is shot while escaping. Diamond decides he has to go find this man with the limp so he can clear himself. With a gun shot wound to his side, a hurt Diamond gets help from a passing motorist who's headed towards the same town.

Episode 15
Sun, May 31, 195930 mins
A nun asks Richard Diamond to find out why the young cornet player for her dixieland jazz band has decided to quit music. He had stopped coming to the jam sessions two weeks ago. Diamond goes to Tommy's home to talk to him and to find out what he's hiding.
Episode 16
Sun, Jun 7, 195930 mins
After Richard Diamond gets blamed for the loss of a valuable diamond, a pure white diamond weighing 135 carats and worth $750,000, he goes undercover at the Onyx Club in Palmville to investigate the connection between the fashion model who was modeling the diamond and the club owner.
Episode 17
Sun, Jun 14, 195930 mins
A dance hall hostess hires Richard Diamond for protection. Before Audrey can explain the situation to him, she's killed. Diamond digs into her background and finds out that her roommate doesn't care for her. Also that the roommate is leading a secret life, which may have something to do with why Audrey was killed.
Episode 18
Sun, Jun 21, 195930 mins
An old girlfriend of Diamond's tries to hire him to handle an extortion plot. He refuses until he's roughed up and shot at, which makes him determined to find answers.
Episode 19
Mon, Oct 5, 195930 mins
A mobster, Trumbo, gives Diamond until 9 p.m. to turn over "the book" or else Trumbo will have him killed. Diamond doesn't have "the book" and has no idea what it is.
Episode 20
Mon, Oct 12, 195930 mins
An acquaintance of Diamond's is murdered. At his grave at a potter's field, Diamond sees a wealthy old woman laying flowers at some of the unmarked graves. Diamond tries to find the connection between her and his down-on-his-luck friend.
Episode 21
Mon, Oct 19, 195930 mins
A bookie that Lt. Kile has been after stages a picture of Kile in a compromising position. He threatens to send the picture to Kile's wife. Kile needs Diamond's help.
Episode 22
Mon, Oct 26, 195930 mins
Diamond goes to Mexico looking for an embezzler and finds a village full of hostility and danger.

Episode 23
Mon, Nov 2, 195930 mins
Richard Diamond is shot and wounded in a San Francisco hotel room and sets out to find the would-be killer.
Episode 24
Mon, Nov 9, 195930 mins
Joey Bishop is a comedian who hires Diamond to find out who is following him. Diamond becomes mixed up in a web of treachery and murder.
Episode 25
Mon, Nov 16, 195930 mins
Diamond is hired to deliver a sealed note to a loan company teller and pick up a package in return. But after he does this, he is arrested and charged with attempting to rob the company.
Episode 26
Mon, Nov 23, 195930 mins
A henpecked marriage columnist hires Diamond to protect him, claiming someone's trying to kill him. Diamond turns him down, feeling that the man should go to the police. He thus feels guilty when the man is murdered.
Episode 27
Mon, Nov 30, 195930 mins
After a meeting at a restaurant Diamond wakes up the next morning seriously hung over and unable to remember anything about the previous day. But the police inform him that he has been charged with murder.
Episode 28
Mon, Dec 7, 195930 mins
Diamond investigates to find out whether an embezzler thought to be dead for the past year is actually still alive.
Episode 29
Mon, Dec 14, 195930 mins
When his latest client steals his car, private detective Richard Diamond is plunged into a case involving stolen money, a social club for the lonely and a criminal with a conscience.
Episode 30
Mon, Dec 21, 195930 mins
A man blames Diamond for his son's death in Korea and seeks revenge. He calls and warns Diamond that he's going to kill him within 24 hours.
Episode 31
Mon, Dec 28, 195930 mins
A beautiful jazz singer shows up on Diamond's doorstep needing help from a former musician bent on revenge.
Episode 32
Mon, Jan 11, 196030 mins
A friend of Sam's wants Diamond to prove that her uncle's death was murder.
Episode 33
Mon, Jan 18, 196030 mins
Diamond is hired by a magician's assistant, and arrives at a performance just in time to see her murdered.
Episode 34
Mon, Jan 25, 196030 mins
A fading actress hires Diamond to find the person who sold her a phony painting.