Mike Post wrote a lot of great ones including the Rockford Files, Hill Street Blues and the A-team but I have go elsewhere for the best overall theme song to Hawaii 5-0.
And just so I can share with others the incredible burden of the inane words to this song randomly repeating in my brain, “A horse is a horse, of course, of course And no one can talk to a horse of course That is, of course, unless the horse is the famous Mr. Ed”
It is disturbing that it is possible to have such power over another person. You have succeeded in changing the currently-playing song to Happy Days, but foiled in your objective in 'making it worse'.... because I feel much happier now.