In an interview with Music From The Movies he also reveals that he’s arranging yet another new version of the theme tune.
"I’ve been approached and we’ve talked about it and by December I should be working on things for Series five," he says in the in-depth interview about his work on the last few specials. “I have started writing some themes and it all looks good. I really wanted to work with Steven… I love Steven Moffat’s stuff. I mean I’ve read scripts and they’re amazing. Episode One is just complete joy.”
He also confirms that Mark ("The Unquiet Dead") Gatiss and Gareth ("The Shakespeare Code") Roberts will be providing scripts for the new season.