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Mac's Back is the third episode of the fifth season of Magnum, P.I. which originally aired on October 11, 1984.


Magnum is despondent over his loss of his wife Michelle, his father, Mac McReynolds, and now Diane Dupres. While driving in Honolulu the next day, he sees a man who could be an identical twin for Mac McReynolds.




  • Jeff MacKay as Lieutenant McReynolds
  • Lance LeGault as Colonel Buck Greene


  • Darryl Ferreira as Father Jim Hiller (as Darryl Ferrera)
  • Glenn Cannon as Dr. Ibold
  • Robert Harker as Jeweler, at Polani Jewelers
  • Fred Ball as Ice Cream Parlor Manager
  • Esmond Chung as Honolulu Police Officer
  • Winston Char as Duc-Ho, the Gambler
  • Ric Groenendal as Sailor (as Richard Groenendal)
  • Phil Johnson as Shore Patrolman
  • Carmella Barut as Carmella (credit only)


  • Legendary Stempede Wrestling professional wrestler Tor Kamaka appears in this episode as one of Duc-Ho's bodyguards. Tor also wrestled in the WWF (now WWE) (managed by Classie Freddie Blassie) in the late 70s.
  • Future longtime KGMB (now HNN) news reporter Jade Moon makes a brief uncredited appearance in the poker game scene.


Higgins: If you're going to drink yourself into a stupor, wouldn't whiskey be more effective?
Magnum: Too hard to keep an even buzz on with whiskey.

Magnum: It's not just Diane! It's Michelle and Mac, Rick's little sister, Dan Cook, the little Vietnamese kid whose name I can't remember....My Dad. All people I loved, or who counted on me, and they're gone.
Higgins: Death is part of life. I know that sounds trite, but the very nature of life means that the older we get, the more loses we can expect. And, if we go to war, or choose a profession such as yours, those loses are going to be higher.
Magnum: Look, Higgins, I know you are trying to help and I appreciate it, I really do. I know this isn't going to solve anything, I know I'm being morose, and stupid, but I just don't give a damn.

Higgins: The two of you are as nervous as a pair of Devonshire schoolgirls.
T.C.: And you're not?
Higgins: No.
T.C.: Then why have you been sipping tea from an empty cup for the last half-hour?
  Season 5 (1980)
Echoes of the Mind (Part 1)Echoes of the Mind (Part 2)Mac's BackThe Legacy of Garwood HuddleUnder WorldFragmentsBlind JusticeMurder 101Tran Quoc JonesLuther Gillis: File No. 001Kiss of the SabreLittle GamesProfessor Jonathan HigginsCompulsionAll for One (Part 1)All for One (Part 2)The Love-for-Sale BoatLet Me Hear the MusicMs. JonesThe Man from MarseillesTorah, Torah, TorahA Pretty Good Dancing Chicken