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The Silent Cry (09/28)
Mannix obtains the assistance of a deaf girl, who reads the lips of a man plotting a crime. The girl plays an important role when the police cannot uncover enough evidence of criminal intent. Gail Fisher is seen for the first time in her regular role as Peggy Fair, Mannix's secretary.

Comes Up Rose (10/05)
Airport security officer Charlie Anderson hires Mannix to find his missing wife, who is also being sought by a syndicate of sophisticated thieves. When Mannix finds her, she is strangely reluctant to return to her husband, although she professes her love for him. After Mannix convinces the woman to return, she suddenly vanishes again.

Pressure Point (10/12)
A wounded young man stumbles into Mannix's home in the dead of night and gasps a cryptic message before passing out. While Mannix attempts to solve the riddle contained in the lad's message, a menacing group of youths comes looking for the boy. The group knocks Mannix unconscious and when he awakens, the wounded boy is gone.

To the Swiftest, Death (10/19)
A race car driver is killed in an event in which Mannix is also a competitor, and the driver's widow hires the detective to investigate possible foul play.

End of the Rainbow (10/26)
The mysterious death of a recently released prison inmate who carried a scrap of paper with Mannix's name on it leads the investigator into a tangled web of grand larceny and duplicity.

A Copy of Murder (11/02)
Mannix hunts for a missing manuscript that holds the key to an unsolved death. The private investigator seeks clues from the victim's glamorous widow, but he is blocked by Police Chief Ford of the beach community of Costa Real.

Edge of the Knife (11/09)
Fritz Weaver plays a brilliant surgeon whose son is kidnapped and threatened with death unless the doctor allows one of his patients to die. The desperate doctor turns to Mannix.

Who Will Dig the Graves? (11/16)
A millionaire philanthropist asks Mannix to find and return his estranged wife to him, even though she is reported dead. Mannix follows the curious trail of the woman, but is unaccountably menaced by a squad of strong-arm thugs.

In Need of a Friend (11/23)
Mannix attempts to dig up conclusive new evidence exonerating David Barker, whom he once helped convict of a million-dollar embezzlement. But nobody is willing to help Mannix, including Barker. Mannix is even more convinced of his client's innocence when someone attempts to kill Barker.

Night Out of Time(12/07)
Cliff Ross, the son of an aviation tycoon, wakes up one morning with a bloody bandaged hand, a missing girlfriend and no memory. Ross hires Mannix to unravel the mystery, which includes murder. Mannix believes his client is in the clear when two friends provide an airtight alibi. Unfortunately, the alibi places Ross at the scene of the killing.

A View of Nowhere (12/14)
While flying in a helicopter, Mannix believes he has seen a woman, Barbara Montford, being murdered. Mannix intensifies his investigation when Montford tries to frame him. To help Mannix solve the case, Peggy goes undercover along with a woman who thinks her uncle was killed by Montford.

Fear I to Fall (12/21)
Mannix smells a frame-up when subpoenaed to testify in a murder case against an ex-con he once sent to jail. Mannix joins forces with the beautiful defense attorney to find the real killer.

Death Run (01/04)
In response to a mysterious plea for help from old friend Bill Chase, Mannix travels to a small mountain town. Mannix becomes the target of the local sheriff, as well as the target of the real killer.

A Pittance of Faith (01/11)
Mannix is hired by 21 people to prove that the death of model Gina Lardelli was not a suicide. Although doubtful at first, Mannix becomes convinced that Gina did not take her own life when two thugs try to force him off the case.

Only Giants Can Play (01/18)
Mannix suspects the bizarre death of a petty criminal may somehow be tied to the gubernatorial campaign of an old nemesis, Jim Claman. Mannix investigates.

Shadow of a Man (01/25)
Nils Sanderson, a wealthy businessman, makes an attempt on Mannix's life but refuses to name the man who forced him to do so. When Sanderson is killed, Mannix begins an investigation to find the murderer and learns that a crime committed 16 years ago in another part of the world holds the key to his identity.

The Girl Who Came In With The Tide (02/01)
Police rule the death of Carol Wilson to be accidental, but Mannix launches his own investigation when he learns that she was the former girlfriend of his longtime enemy, lawyer Alex Ryan.

Death in a Minor Key (02/08)
When Peggy's boyfriend Gabe Johnson disappears, Mannix looks for him, only to find that Johnson is a prison road-gang escapee and is determined not to return to jail. Mannix's search takes him to a quiet southern community where he becomes convinced of Gabe's innocence and suspicious of the local sheriff's attempts to help him.

End Game (02/15)
Mannix goes to the aid of a kidnapped policeman and finds himself cornered in a booby-trapped building. When Mannix meets the kidnapper, he learns of his grand plan to kill everyone who testified against him in a military court-martial trial--a plan that definitely includes Mannix.

All Around the Money Tree (02/22)
Mannix is caught between a band of thieves, a beautiful girl and a Scotland Yard detective, all of whom are searching for Roger Bard and the money from a multi-million dollar robbery.

The Odds Against Donald Jordan (03/01)
Hired to locate building contractor Donald Jordan, Mannix gets conflicting reasons for the disappearance from Jordan's sister, wife and business partner, none of which add up. The case becomes even more complicated when Jordan turns up to assure Mannix he's all right, only to be attacked by two hoods outside the private eye's office.

Last Rites for Miss Emma (03/08)
Mannix almost loses his secretary, Peggy Fair, when he tells her that he suspects her new boyfriend, Floyd Brown, of being the key man in the theft of 45 cartons of morphine. Caught between her loyalty to Mannix and her love for Brown, Peggy refuses to listen to Mannix--but later places her life in danger when she confronts Brown with the accusation.

The Solid Gold Web (03/22)
Mannix becomes involved in murder and political intrigue when he helps newspaper publisher Jason Walker find out the reasons for his daughter Diana's strange behavior. The case rekindles a romance between Mannix and Diana, as he tries to prove that she is being framed in the hit-and-run death of an underworld figure.

Merry-Go-Round for Murder (04/05)
Sue Ane Langdon guest-stars as the beautiful wife of a Las Vegas accountant involved in a confusing case of double identities and double-crosses as Mannix searches for a dead body and $250,000 in cash. Mannix's investigation takes him to Vegas in search of the source of the money and to a condemned boarding school that Mannix believes is the key to the mystery.

To Catch a Rabbit (04/12)
Robert Reed guest-stars as a police detective with whom Mannix works to find the reasons behind the death of Peter Martin.

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