The documentary was broadcast on BBC Radio 4 in 2009 – but it seems that there was quite a bit of material left over. As a result, the BBC’s Official Doctor Who website is currently featuring some of the cut material including some of the interview with Russell T Davies.
Of particular interest however is the interview with Mark Gatiss and documentary producer Simon Hollis which features some good questions about the Target books and this particular gem from Gatiss:
How would you have been described in one of those early Target novelizations?
MG: “A too-tall man with a beak of a nose and sparse reddish hair”.
All of the bonus material is available via this link.