This is where Delia Derbyshire comes in. The Doctor Who theme was just a fraction of what she could do. It’s beautiful and powerful and it’s affected all of us in ways that we don’t know.

"As a kid born in the 1960s, I realized there was a department at the BBC that was purely for making bonkers noises," says Radiophonic Workshop archivist Mark Ayres as the Spitfire Audio suite ...

For such a famous sequence, the Doctor Who titles sure have been through some changes over the years...but which is better?