http://www.zoo.com/quiz/magnum-pi-quiz
I scored 33/35, and both that I got wrong were guesses.

Moderator: Styles Bitchley
That first one is one I missed as well. I forget which other one i missed.Kate Sullivan wrote:I got 33 out of 35 too! I got Magnum's full name slightly wrong - I thought he was TSM the 3rd not 4th, and the question about where he used to work - I knew it was Naval Intelligence but NIA/NIS weren't in the options so I just made a guess - actually, looking at it again, I made a stupid guess. Doh!
Here's what Selleck had to say about it in an interview with Larry King:However, following outcry from fans, who demanded a more satisfactory conclusion, an eighth, final season was produced to bring Magnum "back to life" and to round off the series.[citation needed]
Notice that he says nothing about "fan outrage".KING: Was it a tough show to end?
SELLECK: Yes, it was real emotional. Yes, I had a seven-year deal, which by that time didn't even exist anymore; they were all five-year contracts. So I lived up to my contract, and the head of CBS and Kim LaMasters (ph) and Kerry McClukidge (ph) at Universal both said, Tom, don't announce, we know you're ending it at seven years, but don't announce, you might change your mind. Well, you know, our show was a real family. I knew all our crew, and I knew their families, and I'd come to work every day and everybody would go, what movie is he in? Has he changed his mind? Well, I just caved in about three-quarters. Maybe they were very smart, because "Magnum" -- people should know "Magnum" was not canceled. "Magnum" could have gone for about 15 years, so they wanted every episode they could get, and I just said look, you guys need the plan your life, I kept you in limbo this year, so we did an eighth season.
http://www.cnn.com/TRANSCRIPTS/0007/21/lkl.00.html