Not too long before he wrote his Jaws soundtrack, Mr. Williams went by the professional name of "Johnny Williams," writer of TV themes. He worked on end credits music for shows like Alcoa Theater and the Bob Hope specials. Much of his work was incidental music, and went uncredited in quite a few series.
One of his most frequent gigs was to write for action/adventure shows produced by Irwin Allen. Although he didn't write the theme to Voyage to the Bottom of the Sea, he penned many title tracks for Allen, in shows such as The Time Tunnel, Lost in Space, and Land of the Giants.
Irwin Allen constantly tinkered with shows to maintain his ratings and dazzle his audiences (albeit with a limited budget). An unusual technique that Allen relied on to pep things up was to have Johnny Williams completely rewrite the theme music after a few seasons. One of the most obvious examples is Lost in Space, where Williams had originally crafted an eerie, ominous and echoing theme for the initial two seasons, filled with trumpets, cellos, and piccolos :
Something I didn't realize until recently was that Allen used a similar approach with his 1968-70 series, Land of the Giants. In the show's initial outing, Williams built the theme to underline the ponderous size of the titled Giants on their home world, and the threat they posed to the puny Earth men who had crashed their ship on the Giants' planet.
By the second year of the show, the ratings were dropping, so Allen brought Johnny Williams back to the composing studio to crank out a peppier theme. The new opening would be at a much faster pace, with clashing French horns and bass guitars and syncopated glockenspiels.
The trick worked, and Giants continued for another two years. It's not easy to say that Johnny's new theme "saved" the show, but it certainly didn't hurt the ratings.
Looking back more than four decades at all the work Irwin Allen piled on John(ny) Williams's plate, it's amazing to think about how prolific Williams was beyond his epic movie soundtracks. I can't imagine any current TV theme writers jotting down so many disparate themes and variations for the same shows in the same time frame. Okay, maybe Michael Giacchino - - but is he still doing TV shows after LOST?