Hawaii Five-0 fans: Jimi Hendrix soundtrack question?

Please excuse my ignorance, I have only seen a few episodes of the new Five-0 series. I was just watching the end of an episode on TV and I heard a few Jimi Hendrix songs. Was this just the soundtrack for this particular episode or do they often play Hendrix music on the show? If they only used Hendrix for a single episode, was there some significance for using Hendrix on this particular episode? I didn't see the entire plot. I only caught the tail end of the show. I'm such a big Hendrix fan that I would probably start watching the show, if they made a habit of using his music on the show. As far as the show itself goes, it seems pretty decent from what little I've seen. I watched the old TV series when I was a pre-teen and a teenager, but I was only a semi-fan. One of those shows I watched because my parents watched it and we only had one color TV in the house.