Magnum protects a woman (Sharon Stone) receiving death threats; Higgins' reluctant love suddenly agrees to marry him.
The arrival of a jealous twin (Sharon Stone in a dual role) endangers Magnum's affair with his client.
Thomas uncovers illegal gambling while trailing a Navy chaplain (Jeff MacKay) who is the double of a friend killed in an explosion.
Garwood Huddle (Pat Hingle) escapes from prison to save his kidnapped grandson; guests Belinda Montgomery, John Ratzenberger.
TC lies comatose after a helicopter accident, leaving Magnum with a baffling case full of deceptive people.
A psychic (Samantha Eggar) has a premonition of her own murder; guest Kenneth Mars.
A tape helps Magnum solve a murder and discover the suspect's other crime; guest Barbara Rush.
Students in Magnum's class on private investigation help solve a classmate's case; guest Kim Miyori.
Thomas runs into the mob and political corruption after helping an Amerasian boy (Roland Harrah III) find his GI father.
St. Louis private detective Luther Gillis (Eugene Roche) helps nab a man threatening to expose an old indiscretion of Higgins'.
Robin asks Magnum to vacate the guest house to accommodate an interfering novelist (Cassie Yates) with writer's block.
Magnum finds romance with a security expert (Jenny Agutter) hired for a jewelry exhibit at Robin's Nest; guest Cesar Romero.
Thomas uncovers secrets about Higgins' cousin, whom Jonathan and Agatha are polishing for a society marriage.
A jealous co-worker (John Pleshette) disrupts Magnum's probe of threatening events surrounding Carol's parole-hearing testimony.
Magnum, Rick, TC and Higgins join a pilot (Robert Forster) on a mission to rescue a friend in Cambodia.
Magnum learns McKinney's (Robert Forster) rescue mission is a cover for his plan to avenge their friend's death.
Mac (Jeff MacKay) returns and involves Rick in a scheme concerning a luxury boat and its complement of four geishas.
A country singer (Dennis Weaver) comes to Hawaii to find love songs by a composer who died in a plane crash 25 years before.
Abandoning a grudge with the Hall of Records, Magnum helps a clerk find her husband, an artificial-intelligence expert.
France's most famous police officer (Paul Verdier), traveling incognito in Hawaii, asks Magnum to help find a missing heir.
Thomas aids a rabbi (Nehemiah Persoff) who came to Hawaii with a Torah returned to him by Taiwanese officials.
Magnum exposes the fencing of guns and enters a prison farm to find the ex-beau of a missing girl; guest Matt Clark.