You’ve probably heard Five For Fighting (aka singer/songwriter John Ondrasik) in many different settings. It may have been in a film (The Blind SideThe Sisterhood of the Traveling Pants) or maybe on a television show (Smallville or Dawson’s Creek). If you follow hockey, you may even have heard him at an NHL game: Ondrasik is a hockey fanatic, and has performed at a couple of LA Kings games.

Now, Ondrasik is helping the CBS series Hawaii Five-O celebrate its one hundredth episode, which airs tonight (November 7). The song that he wrote for the occasion, “All For One,” will air in its entirety on the episode.

READ MORE: Gas Prices Up In New Jersey, Around Nation Amid Refinery Outages

“As a fan of the original show — I’m old enough to remember the original show,” he says, referring to the show’s original run from 1968 through 1980, “I was intrigued when [executive producer] Peter [Lenkov] pitched me on writing an original song for the 100th episode. He told me about his idea — they didn’t have the script quite done yet. But I thought it was very unique, and he wanted a song that reflected the, as he would say, “ohana” vibe of his show—the family vibe. And I thought I could do that. I sat down at the piano and wrote a song that talked about the relationship these characters had formed.”

READ MORE: 'The United States vs. Billie Holiday' Goes Deeper Into Background Of Classic 'Lady Sings The Blues'

Of course, Hawaii Five-O boasts one of the most iconic theme songs of any television show, ever. Was there any temptation to bring a surf vibe to his music?

MORE NEWS: Fire Crews Rush To Battle Burning House In Delaware County