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24 Episodes 1975 - 1976
Episode 1
Fri, Sep 19, 197560 mins
Barnaby Jones and Frank Cannon continue to work together to unravel a deadly conspiracy to cover-up corporate wrong doing and several related murders. Meanwhile, Betty goes undercover to help them crack the case despite the dangers.

Episode 2
Fri, Sep 26, 197560 mins
An aging star of the stage trying to make a comeback is being terrorized by someone who doesn't want to see that happen. Barnaby is hired by her agent to sift through the long list of possible suspects.
Episode 3
Fri, Oct 3, 197560 mins
A mentally unstable young man who was declared innocent of murder by reason of insanity several years ago is once again suspected of murder. It's up to Barnaby to prove him innocent of being who authorities are calling "The Orchid Killer".
Episode 4
Fri, Oct 10, 197560 mins
Barnaby looks into the alleged accidental death of an investigative reporter and soon discovers that it is a case of murder. He also believes that there may be another murder directly related to the case.

Episode 5
Fri, Oct 17, 197560 mins
After a man's wife disappears on their wedding day the concerned husband asks Barnaby to look into what may have prompted her to run away. While investigating Barnaby discovers the bride has a dangerous past that has come back to haunt her.
Episode 6
Fri, Oct 24, 197560 mins
Sabotage leads to murder when competing teams within a military weapons contractor try to develop a new missile guidance system. Barnaby discovers a couple of love affairs involving team leaders and the bosses wife may also be part of the motive for murder.
Episode 7
Fri, Oct 31, 197560 mins
An airline stewardess is an unsuspecting mule to smuggle heroin into the country for her boyfriend and his partner. After she discovers what's going on she is murdered for it. As a favor to her father Barnaby looks into the case.
Episode 8
Fri, Nov 7, 197560 mins
Barnaby investigates a woman who has set out to exact vengeance on the two men she blames for her fathers suicide. After killing the first one she is double crossed by the second one and her boyfriend in order to gain control of her assets.
Episode 9
Fri, Nov 14, 197560 mins
Barnaby Jones is hired to investigate when a philandering doctor is indicted for murdering a colleague's wife. Barnaby must ensure the safety of the only witness the crime: a teen-aged girl.
Episode 10
Fri, Nov 21, 197560 mins
Barnaby Jones uncovers a seamy world of adultery and corruption when he investigates a couple of suspicious deaths where the perpetrator appears to be a young boy's beloved pet dog.
Episode 11
Fri, Nov 28, 197560 mins
An estranged sister and her boyfriend try to cash in by claiming to be the mother of her sister's daughter that she had given up for adoption 22 years ago- and who just happened to inherit millions of dollars. Barnaby investigates further when things don't add up.
Episode 12
Thu, Dec 4, 197560 mins
Barnaby suspects an inside job when he investigates the theft of a jewel collection from a well-to-do family.

Episode 13
Thu, Dec 11, 197560 mins
A scorned wife hires Barnaby Jones to find her bigamist husband. She wants a divorce and child support. What Barnaby finds is an elaborate blackmail plot, involving an attorney who is having an affair with the bigamist's other wife.

Episode 14
Thu, Dec 18, 197560 mins
A wealthy art collector's much-younger wife plots to replace one of his paintings with a forgery, but her plan is complicated when he collapses and dies after catching her in the arms of her lover.
Episode 15
Thu, Jan 1, 197660 mins
Ray Dixon has too much invested in molding his son Norm into an Olympic champion and sees those dreams threatened by a rival swimmer. Ray changes out his medication and the young man dies. Barnaby Jones tackles an seemingly unsolvable case.

Episode 16
Thu, Jan 8, 197660 mins
The death of a woman's sister is ruled a suicide, but the woman doesn't buy it and hires Barnaby to look into it. What he discovers is a man who preys upon lonely single women for information so he can steal from their businesses that they work for, and he may have had something to do with the woman's death.
Episode 17
Thu, Jan 15, 197660 mins
The brother of a man imprisoned for murder kidnaps and holds Betty hostage. In exchange for her release he demands that Barnaby finds enough evidence to clear his brother of the murder he did not commit.

Episode 18
Thu, Jan 29, 197660 mins
The daughter of a writer Barnaby knows hires him to find her father who has gone missing. Barnaby learns he is writing a book about the mob and his source is a mob boss who is out to expose a rival who killed his son. And when the rival learns of this he sets out to stop the man.
Episode 19
Thu, Feb 5, 197660 mins
A stable boy who's been in trouble with the law before is afraid that he's responsible for a horseback riding accident that resulted in the death of a wealthy business man. Barnaby investigates and believes that all is not as it appears.

Episode 20
Thu, Feb 12, 197660 mins
When Rick Lorenzo, the owner of a restaurant is found dead, his brother/business partner, Harold Lorenzo, asks Barnaby to investigate. He thinks Barnaby should focus on one of his brother's employees, the restaurant manager, hot-tempered Vince Bradford, who happens to be a now-married former boyfriend of Betty, and the two remain friends. Some sticky situations ensue.
Episode 21
Thu, Feb 26, 197660 mins
While investigating a car/pedestrian accident Barnaby realizes that he's uncovered a plot to rob a bank of $246,000 and murder.

Episode 22
Thu, Mar 4, 197660 mins
When a young woman drowned while swimming at night, her father hires Barnaby to look into it because he doesn't believe his daughter would swim at night. Barnaby learns that she was last seen with a young man who says he doesn't know what happened to her. But in actuality, the girl went to see him and said something that got him all riled up and he killed her. And when a friend of his found something that belonged to the girl and shows it to him, he again loses his cool and kills him.
Episode 23
Thu, Mar 11, 197660 mins
A mentally challenged young man stumbles upon a murder being committed and tries to help the victim, but he's too late and the real assailant flees the scene before any other witnesses show up. The local sheriff wants to charge him for the murder, and it's up to Barnaby to prove that he has the wrong man.
Episode 24
Thu, Mar 18, 197660 mins
Barnaby poses as the brother of a business man in order to find out who's behind a series of accidents that he believes were intentional-and meant to kill.