* AlternativeCharacterInterpretation: Is Magnum good or evil? The show plays with both, as Magnum is a {{hero}}, but can be ruthless.
** Is Higgins a JerkWithAHeartOfGold or just a JerkWithAHeartOfJerk? He doesn't really seem to like Magnum and doesn't really try to help that much (see "Thank Heaven for Little Girls and Big Ones Too" and "Tropical Madness").
*** Higgins more slowly warmed up to Magnum. After all, he is very British and Magnum is an American SurferDude.
* AwesomeMusic: The opening theme music by Mike Post.
** The original theme by Ian Freebairn-Smith is also pretty catchy.
* CrossoverShip: Almost a canon example. The end of the ''Series/MurderSheWrote'' crossover teased Higgins and Jessica Fletcher, although it never went past Higgins quite obviously crushing on Jessica, to her (and Magnum's) amusement.
* HilariousInHindsight: The bad guy in "Don't Say Goodbye" is played by [[spoiler: Ted Danson, several years before he and Tom Selleck were two of those ''Film/ThreeMenAndABaby''. Unfortunately Steve Guttenberg never appeared on the show to complete the set.]]
** "Holmes Is Where the Heart Is" sees Higgins (all but literally) assuming TheWatson role alongside his friend David Worth ([[NapoleonDelusion who thinks he is Sherlock Holmes]]). John Hillerman would later actually play Dr. Watson in the 1990 TV movie ''Hands of a Murderer'' alongside Creator/EdwardWoodward as Holmes.
** "The Return of Luther Gillis": [[Film/{{Spaceballs}} "Who's Dot Matrix and what's she got to do with this?"]]
* HoYay: Between Rick and T.C.
* ThrowItIn: "Don't Say Goodbye": Magnum pushing Amy Crane into the water then jumping in himself once confronted with Stewart's boat hook was ad-libbed by Tom Selleck. It wasn't part of the script, but was left in at Selleck's insistence.
* UnintentionallyUnsympathetic: Subverted. In "Blind Justice", Magnum discovers that the man on trial for murdering his wife [[spoiler: is actually innocent ([[DrivenToSuicide she had committed suicide after years of his abuse]]), but that he had also gotten away with a different murder years earlier. When confronted with this fact by Magnum, the wife's mother, while her reasons are totally sympathetic, coldly defends her cover-up of the suicide to get her son-in-law on trial. What even the episode itself doesn't touch on, however, is that the person whom the husband ''did'' murder [[FridgeHorror likely had a family themselves and who would be denied justice by the mother-in-law's actions]], though [[NoEnding the episode ends before the trial's verdict.]]]]
* ValuesDissonance: Even though it was an [[{{Homage}} homage]] to the original Sherlock Holmes stories, there is no way ''in hell'' Patrick [=MacNee=] in [[{{Yellowface}} yellowface]] disguise would fly on television today.
** Ivan calling T.C. by the "N" word in flashbacks was controversial even for the 1980s, but it certainly won't be said on U.S. network television now.