1968 Mercury Park Lane Brougham
The 1968 Park Lane appeared from Season 1 through the middle of Season 7 and in stock footage and stunt footage thereafter.
Read Michael Timothy's personal report (with links to pictures) about what it was like finding and restoring McGarrett's 1968 Mercury Park Lane. http://www.mjq.net/fiveo/50mercury.htm
1972 Mercury Marquis
The 1972 Marquis appeared in "Will the Real Mr. Winkler Please Die?" (Season 5), "Flash of Color, Flash of Death" (Season 6), "Loose Ends Get Hit" (Season 8), and "Dealer's Choice - Blackmail (Season 9).
Read about how McGarrett almost got a 1972 Mercury Marquis -- except that Jack liked the Park Lane. http://www.curbsideclassic.com/curbside-classics-american/curbside-classic-and-automotive-history-good-lord-the-1972-mercury-marquis-and-its-flirtation-with-infamy/
1974 Mercury Marquis
The 1974 Marquis appeared from the middle of Season 7 through the end of Season 12.
Read a fascinating article (with pictures) about McGarrett's 1974 Mercury Marquis Brougham. It's a 40-year review that shows what the car looks like today (sad!) and tells about John Nordlum's role on Hawaii Five-0. http://driving.ca/mercury/auto-news/entertainment/book-em-danno-a-ride-in-hawaii-five-os-mercury-marquis
ME-TV tells us what 10 classic TV cars were worth when they were new and what they are worth today. Some of the prices are surprising! Yes, McGarrett's Park Lane made the list. http://metv.com/lists/what-10-classic-tv-cars-are-worth-today
History of the Mercury Park Lane
Magazine advertisement for the 1968 Mercury Park Lane
with Ford Tri-Motor in the Background (Ford Motor Company)