A wealthy man hires Mannix to find the person blackmailing him—eventually leading to Mannix being suspected of murder.

Peggy's late husband is named on a list of payoffs.

Mannix reopens a malpractice case against opposition.

A killer's attempt leaves Mannix blind.

A colleague's death leads Mannix into a dubious investigation.

An accidental drowning has many surprising facets.

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.

Mobsters try to extort a million from a small town.

Someone is out to get a film star.

A hit-and-run case lands Mannix in the middle of a gang war.

The attempted murder of an executive leads Mannix to several likely suspects.

A murder in the offing implicates an old army chum, but the victim's identity is uncertain.

A TV host's murder proves difficult to investigate, as everyvbody wants it canceled.

Old home week, as Mannix looks into a murder and tries to make up with his father.

A stolen thoroughbred has Mannix buffaloed.

A secretary has an enemy, but who?

Mannix tries to locate an heir, who is brought into danger by the attention.

Two pals of Peggy's are accused of murder, and the real killer is elusive.

A policeman's son is suspected in a robbery.

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 even more valuable.

Carnival mishaps may be aimed at the proprietor.

A colleague's death leaves Mannix with the evidence he was murdered for.

Mannix has an enemy who seems to be dead.

The strange utterances of a disturbed young girl are clues in a case of robbery and murder.