No, it won't give away any details. You will enjoy how really old it is-from the make of the cars, to the oh so, so serious actors. They all wore suits, too. No technology-no cell phones, computers-just hit the pavement asking questions-the old detective way.

They did 1 anniversary episode in 2013: Hookman which is a remake of a 1973 episode. There's a few twists, and tweaks to it though, to keep it fresh(both episodes are on the season 3 DVD-set)

For the rest they're stand-alone shows, where the new-version occasionally pays hommage to the original.

How could it give spoilers when they didn't know there would be a new one 45 years later?

If anything - the new one would reference things from the old show.

No, the old one won't give away anything related to the new series

No spoilers at all, though there are a few "homage" scenes.

not at all

different characters- it is the Next Generation

I love the new Hawaii Five-0 show, and I really want to watch the old one, but I need to know if it'll give any spoilers for the modern version or not first, so, I I were to watch the original series, would there be spoilers for the modern show