Who Wants To Be A Millionaire first aired in Britain in 1998 and became a global quiz format, famous for its dark studio, lifelines and escalating prize ladder. Its score, by Keith and Matthew Strachan, changes with each prize level, growing darker and more urgent as the money rises. The music for the 64,000 to 500,000 questions became one of the most recognised tension beds on television. Clips of that stage are now reused online as a shorthand for pressure, hesitation and a make or break decision.