As The Phantom Of The Opera celebrates its 25th anniversary, Don Black talks to composer Lord Andrew Lloyd Webber, lyricist Charles Hart, producer Sir Cameron Mackintosh and the choreographer Gillian Lynne, to explore The Phantom Phenomenon.
He asks why this long-established musical continues to break records: it's the longest running Broadway musical and the second longest in the West End, where it continues to reign supreme at Her Majesty's Theatre.
To date it has been seen by 130 million people in 145 cities in 27 countries around the world.
And it has taken an estimated $5.6 billion worldwide - more than any film or stage play in history, including Avatar, Titanic, E.T.
and Star Wars.
To mark the anniversary, a special performance was staged at London's Royal Albert Hall in the first weekend of October, and streamed live via satellite to cinemas across the globe.
It brought audiences to their feet and achieved a further record as the biggest box-office result for any non-feature film big screen release in the UK.
A few highlights from this performance will feature.
Don Black talks to the creative team behind The Phantom of the Opera musical.