Thirty years ago, The Muppet Christmas Carol was about to be released. And its director, Brian Henson, was keeping a low profile. “I was hiding in my apartment in London, on Parliament Hill,” he says.

The Moment: The ending of The Muppets abandons narrative in favour of a carnival-esque celebration of all things Muppet, with a reprise of 'Life's A Happy Song' and the return of old favourite 'Mahna ...