Higgins' half brother, an Irish Catholic priest from Northern Ireland, arrives in Hawaii to confront a British officer who he claims stole an ancient artifact from his church.

Higgins volunteers Magnum's services to guard a wealthy socialite's quarantined dog after the attempted dognapping of the canine. Sir Algernon Farnsworth soon finds himself to be the most wanted dog in Hawaii when his former owner, aging gangster Victor DiGiorgio, needs to get him back.

Magnum is displaced from the guest house when an overly imaginative novelist, who suffers from a sever case of writer's block, becomes suspiciously interested and involved in his latest case.

Mad Buck Gibson, an old friend of Robin Masters and a legend in his own time for his earthy novels and macho existence, arrives in Hawaii and it becomes Magnum's lot to protect the hell-raiser from himself.

Magnum and Rick discover that trouble comes in all shapes and sizes.

Magnum befriends the young Price of Jororo who is the target of terrorists.

Magnum's encounter with a photographer uncovers an embezzler long thought dead.

It's the Christmas season, and against his better judgment, Magnum agrees to being hired by five young schoolgirls to find their teacher, who has seemingly gone missing after falling in love. While he's working on the case, Magnum manages to convince Higgins to let the young girls stay on the Masters estate, but he's unaware that he's being deceived in a scam over a valuable painting recently purchased by Robin Masters.

A woman hires Magnum to protect Norman, who is facing kidnap unless she pays a ransom; but the case has some unexpected twists.

Magnum has been hired by a woman to act out some of her rich, bored sister's fantasy dramas, concocted from 1930s Dashiell Hammett films. Although growing to enjoy the world of fantasy, Magnum has a hard time keeping up with the eccentric woman, and when he finds out that her husband is a wealthy, infamously jealous and bad-tempered business man, he decides to cut his losses and end the arrangement.

When her wealthy American husband is kidnapped and held for an exorbitant ransom, a beautiful Japanese woman seeks Magnum's help.

A simple request to act as a bodyguard for a world famous ballerina leads to a puzzling international situation for Magnum.

When Magnum flies to Sicily, at the request of Robin Masters, to rescue a beautiful damsel in distress, he proves that chivalry is alive and well.

Magnum is pleased to see his friend, Marcus, driving a new expensive sports car but the pleasure turns to dismay when Marcus' battered body is discovered in the surf.

An old friend from Magnum and TC's Vietnam days turns up in Hawaii asking for their help.

Although Eric Tobin was reported missing in action over eight years ago, his fiancee, Laura Fraser, endowed with ESP, doesn't believe it. Magnum befriends her and, in finding out the truth about Tobin, discovers that he was a highly trained and effective government agent working under the control of a man known only as Delta One.

The code of the West is resurrected when a hot-headed young Texan hires Magnum to find his former cheerleader sister.

Magnum plays Cupid's helper when he becomes involved with a former Russian pilot who has defected and a member of the Soviet track team in Hawaii for an exhibition match, plus various members of the dreaded KGB.

As a favor to his old friend, quarterback Dorsey Bramlett, Magnum joins the pro football team in training so he can better protect his old Academy buddy.

When Magnum encounters a guitar-playing, ten gallon hat wearer with a thick Texas drawl, who looks exactly like Higgins, he thinks he is being set up for a rip roaring gag.

Earl Gianelli, an aged wrestler who hires Magnum to find his long lost son, puts the private investigator on a bloody trail of revenge.

Magnum finds himself working with anachronistic gumshoe Luther Gillis again after someone kidnaps Higgins and Luther's secretary.

Magnum returns home after 13 years to attend his beloved grandfather's funeral.

Higgins must cope with a visiting dignitary, an invitational chess tournament and the appearance of his flamboyant half brother.

Friendships are tested when Rick becomes a million dollar lottery winner while TC and Magnum fight the destruction of TC's club house for underprivileged and troubled kids.