If you are like me and do not receive BBC America, you may be pleased to know that their latest Doctor Who related special, The Science of Doctor Who (science in Doctor Who? Who knew?) is available via iTunes for purchase ($2.99).
I haven't seen it yet myself, so I can't comment on the special, though I have heard that not surprisingly it only focuses on post-2005 Doctor Who unfortunately. If you want to find it on iTunes, there's an affiliate link below to it.
Mark Gatiss leads a 30 minute documentary on BBC Radio 4 exploring Doctor Who novelisations published by Target books. The audio documentary, On the Outside it Looked Like an Old Fashion Police Box is available to listen to via the BBC iPlayer (it is available outside of the UK) for the next seven days.
It features interviews with Terrence Dicks, Anneke Wills, and Russell T Davies among others, as well as audio clips from various audio book adaptations.