Mannix is hired to find out any dirt on Govenor-elect Adam Pierson, and that's when the trouble starts: with his syndicate connections, people are dyi...
Mannix is set up for the murder of an old girlfriend's husband.
Investigating an insurance claim, Mannix finds himself intensely scrutinized.
A libel suit against a newspaper at the state capital involves politics and the mob.
A psychopath's next victim might be his wife.
The strong friendship between Lew Wickersham and Mannix melts into a violent and deathly feud. The bitter battle begins when Mannix launches an invest...
Mannix quits rather than chase a necklace and a mobster, and stumbles into a case of murder and fraud.
A missing million leads Mannix out of Intertect as bait for a drug ring.
Mannix finds new evidence in the case of an embezzler he sent up the river.
A young heir wakes up bloodied and minus a grlfriend.
On a helicopter trip, Mannix thinks he sees a murder being committed.
Mannix is called to testify against an ex-con he sent up, but his time suspects a frame.
An old pal asks Mannix for help; when he arrives at the man's rural town, there's murder afoot.
A attempt on his life forces Mannix into a complex search.
Scotland Yard is after millions from a robbery, and they're not the only ones.
A missing contractor leads to mixed motives and a doubtful case.
A newspaper publisher's daughter is implicated in the death of a mobster.
A boarding school marked for demolition sets off a mystery involving a corpse and a quarter-million.
Two pals of Peggy's are accused of murder, and the real killer is elusive.
Old home week, as Mannix looks into a murder and tries to make up with his father.
Three thugs hold Mannix, Peggy, and a woman hostage, claiming they want the $312,000 she has in a briefcase at home, but they may be after something e...
The attempted murder of an executive leads Mannix to several likely suspects.
A wealthy man hires Mannix to find the person blackmailing him—eventually leading to Mannix being suspected of murder.
Eyewitnesses peg Mannix's client, but the victim isn't what he seems, either.
A domestic quarrel, and a missing secretary, make for a confusing case—“Rashomon”-style.
Mannix tries to locate an heir, who is brought into danger by the attention.
A murder in the offing implicates an old army chum, but the victim's identity is uncertain.
The strange utterances of a disturbed young girl are clues in a case of robbery and murder.
A colleague's death leaves Mannix with the evidence he was murdered for.
A TV host's murder proves difficult to investigate, as everyvbody wants it canceled.
Mannix is up to his private investigator's license in trouble, when a surprising source offers help.
An African Premier is in the hospital incognito, where Peggy is laid up with on-the-job injuries.
A Nazi Party figure turns up in the routine investigation of a helicopter crash.
After her husband commits suicide in Hong Kong, Ellen Gray finds she's being shadowed by a Vietnamese for reasons that neither she nor Mannix can fath...
Mannix vaguely remembers a girl's death, but that's about all.
Ross and Alex are members of Mannix's college football team who put together an unconventional reunion in a ghost town. The reunion ends in murder and...
A varsity basketball player vanishes strangely, and is sought curiously.
After an automobile accident, an Olympic diver receives threats.
Joe Mannix receives an urgent letter from a woman named Lynn Sargent asking him to fly to Arizona. She meets him at the airport and hands him a check ...
Mannix is the eyewitness of a murder; reportedly, it occurred a year before.
Soviet agents want Marx's manuscript of Das Kapital, and a young woman has just inherited part of it.
The Case of the Singing Harp: a singer is kidnapped to reveal hidden loot.
Disappearing enemies and friends force Mannix into a blackmail investigation.
Murder on the golf course leads to open season on Mannix, who's looking for valuable microcircuit plans hidden by the victim.
The fictitious name on a partnership contract apparently comes to life.
Was a police shooting premeditated? Mannix is on (and off) the case.
A racing accident lays Mannix up. While recuperating, he hears threats against him, but are they real?
An aircraft prototype is debuted under mysterious circucmstances.
A stamp collection goes missing, and a starving artist gets rich.
A ship lost at sea leaves a survivor and a curious tale.
Someone is trying to kill a bum for his ""coat of many colors.""
An ex-con's daughter is suspected in murders surrounding the unrecovered loot.
Political blackmail turns to mischief when the blackmailer is found to be long dead.
A quiet town is ruffled by Mannix in his search for a missing youth.
A search inquiry proves hazardous, and Mannix finds his client is a ringer.
A girl disappears, and Mannix investigates her Vegas connection.
An opera diva emerges from retirement and is met with inexplicable attempts on her life.
An old girlfriend makes Mannix the man in the middle of rival smugglers.
A patriot in a dictatorship needs medical help.
The patriotic resistance finds a traitor amongst them.
In possession of a piece of evidence, Mannix is shot and left for dead.
A psychiatrist who treats sociopaths is supposed to have committed suicide.
A Leonardo, a forger of currency, is sought by practically everybody.
Japanese consular matters entail a private eye and Mannix's cooperation
A chance meeting between two Vietnam veterans proves fatal for one of them after they are spotted by a third buddy, a deserter who has no intention of...
The death of an inventor raises questions of motive.
On an island off the South American coast, Mannix seeks out the rescuer of a client's son.
An assassination plot is revealed in the course of Mannix's investigation.
