An eccentric, reclusive inventor, a beautiful author and a distraught senator's wife form the strange triangle surrounding Magnum as he tries to unravel a situation that could lead to sudden death.

Magnum does not count on murder when he chaperones Rick's convent-school sister on a night on the town.

A reluctant Magnum agrees to help a friend of Higgins to find the person or persons responsible for the kidnapping of his grandchild.

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.

Magnum is elected Local P.I. of the Year, yet his award presentation as well as his investigation into a murder is hindered by the intervention of Luther Gillis and Tracy Spencer.

Magnum is wounded while saving a young Hawaiian woman from a hired killer.

The murder of Carol's mentor, Judge Kearns (Michael Constantine), raises suspicion that he may have been involved in taking payoffs.

Rick is arrested for allegedly killing a hit man contracted to murder Icepick.

While helping Higgins with a pageant for the Hawaiian Historical Society, Magnum becomes infatuated with an ethereal and elusive local beauty, bringing danger to them both.

As Rick's wedding looms ever closer, Magnum continues his surveillance on Linda to try and catch the psychopathic killer who is stalking her. T.C. faces a reconciliation with his estranged wife. And Magnum gets some surprising news about his theory that Higgins is really Robin Masters, as well as the true fate of Lily.