In this episode, TM does not have the use of the Ferrari, as Higgins has taken the keys. Forced to buy a used car, Magnum is tempted by a Jaguar E-Type convertible. However, that car turns out to be a complete dog with all sorts of electrical and engine problems. This can be seen as a in-joke on the fact that Jaguar had originally been approached by the producers of the show, about them allowing the use of the then already iconic E-Type car. When Jaguar asked for too much money the producers were forced to look elsewhere. Ferrari caught wind of this and happily donated their brand new 308 GTS sportscar to the show.
This is Barbara Rush's first appearance in the series. She would later appear as Magnum's favorite aunt, Phoebe Sullivan, in Season 7 "The Aunt Who Came to Dinner" (1987).