Bernie Hoffer: The Music of ThunderCats

Thunder, Thunder, Thunder, ThunderCats: how the theme song was made

Six syllables. One shout. Forty years later you still hear it from anyone who grew up between 1985 and 1989. The story of how the ThunderCats theme got built is shorter than fans usually expect.

Who actually wrote it

The recurring online claim that James Lipton, the host of Inside the Actors Studio, wrote the ThunderCats theme is an urban legend. It started as an addition to the show's IMDb trivia page around 2010, spread on social media, and has been quietly debunked ever since. Lipton had nothing to do with the cartoon.

The credit is simpler than that. The music was composed by Bernard Hoffer. The lyrics were written by Jules Bass, one half of the Rankin/Bass production company that made the show.

Hoffer's own description of how he wrote it: "When I got the assignment, I looked at the lyrics and wrote, essentially, what was a song to those lyrics." That is the order things happened in. Jules Bass wrote the words first. Hoffer then wrote a piece of music that fit the rhythm and meter of the lyrics, the way you would set a poem. According to supervising producer Lee Dannacher, the whole thing came together in about three weeks.

The voice you actually hear

The shout of "ThunderCats HO!" that lifts the chorus every time is performed by Larry Kenney, who also voiced Lion-O for the entire run of the show. Kenney was a New York radio personality by trade and brought a broadcaster's projection to the line. The reason the shout cuts through the orchestration the way it does is that Kenney was used to landing a phrase against a full music bed every day on the air. If you grew up imitating that line in a school playground, you were imitating Larry Kenney.

When in production it was finalised

The theme was written during pre-production in the early 1980s, before the show went into full episode animation. The roughly three-week composition window means the theme existed in close to its final form before most of the episode scripts were locked. Hoffer then used motifs from the theme as the harmonic and rhythmic foundation for the rest of the score, which is part of why the music across all four seasons feels so unified. The character cues do not just sit alongside the theme. They share DNA with it.

Why fans hold it sacred

First, the theme is unusually well written for a cartoon opening. The melody has real interval movement, the harmonies are not the lazy I-IV-V most action shows of the era leaned on, and the percussion writing is genuinely orchestral.

Second, the lyric is built for kids to shout. Jules Bass wrote it as a callable, repeatable phrase with a built-in audience response moment. The "Thunder, thunder, thunder" stack is participatory by design. Forty years later it is still the line every fan can produce on cue.

Third, it has held up. The theme has been covered, sampled, re-arranged, and used as the basis for tributes by working musicians ever since. It was not a stinger. It was a song with a verse, a chorus, a bridge, and a hook that returns. Fans react to it as music, not as a logo cue.

Fourth, it is also a song about identity. The lyric is the ThunderCats announcing themselves: who they are, what they do, that they are loose. For an audience of seven-to-ten-year-olds in 1985, the chorus was a thirty-second mission statement they were invited to chant along with. That is rare in a cartoon opening, and that is why people still know it.