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, ageing gangster Victor DiGiorgio, has need to get him back. Magnum and an animal regulations officer are soon on the run with Algie from the would-be dognappers - and the fact that the officer seems to be scared of dogs doesn't exactly make matters any easier - but just why does DiGiorgio want the mutt back so badly?...
Cast of Magnum, P.I.
Tom SelleckThomas Magnum
John HillermanJonathan Higgins
Roger E. MosleyTerry "TC" Calvin
Larry ManettiRick Wright
Gillian DobbAgatha Chumley
Sharon StoneDiane Dupres / Deirdre Dupres
Denny MillerLeon Platt
June ChadwickEnglish Flight Attendant
Carolyn SeymourElizabeth, Lady Ashley
Margie ImpertMadeline Jones
Kathleen LloydCarol Baldwin
Margaret LaceyMrs. Ridley
Ernest BorgnineEarl Gianelli / 'Mr. White Death'
Hari RhodesPrison Guard
Peter DavisonIan MacKerras
Arthur EnglishNewspaper Seller
Julian GloverDuncan Scott / Police Inspector Stokesay
Joseph LongCommander Ocho
Geoffrey BeeversMortuary Attendant
Glenn CannonDr. Ibold
Ed LauterCaptain Quintin
Amanda McBroomCountry Singer