http://www.themarysue.com/moffat-wants-to-do-more-online-only-content-for-doctor-who-this-season/

"I think we now have to accept that online stuff isn’t a spin-off anymore,” says Steven Moffat.
Read more at http://www.hitfix.com/tv-tattle/2#SHXCROtBZW3h0h2z.99