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 reveals years of deceit and jealousy that come to light in a series of bizarre and morbid.

A street gang plots to do Mannix in to make a name for itself.

Murder on the rock circuit.

An heiress suspects foul play.

A patriot in a dictatorship needs medical help.

The patriotic resistance finds a traitor amongst them.

A missing contractor leads to mixed motives and a doubtful case.

Mannix cooperates in a police investigation.

A newspaper publisher's daughter is implicated in the death of a mobster.

Someone keeps missing Mannix, but who's the real target?

A threatened suicide.

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.

Mannix transports jewels from London, or is that his double?

A boastful nemesis takes Peggy for bait.

Carnival mishaps may be aimed at the proprietor.

A Nazi Party figure turns up in the routine investigation of a helicopter crash.

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 for $1,000 and a small sealed package, telling him the money is his fee to take the package to the Los Angeles Police Department. Just as she does so, two men try to take the package, but Mannix manages to retain it after a scuffle. But the mystery deepens when the package turns out to contain nothing but blank sheets of paper -- and the police chief in the town tells Mannix that Lynn Sargent died a month earlier in a hit-and-run accident.

A gang boss engineers a deceptive getaway.

The vortex of the paranoid: Mannix is threatened and framed.

Mannix is hired to vet a prospective bridegroom.

A faith healer gets blackmailed.

A amnesiac veteran is up to his stripes in mischief.

A trail of evidence indicates a friend of Peggy's.

A search inquiry proves hazardous, and Mannix finds his client is a ringer.