The David Tennant Treat 4 Today is a clip from when David Tennant interviewed Russell T Davies on a programme called Who On Who? which was originally broadcast on BBC on Radio 2 on Tuesday 29th December 2009.
In this clip they discuss he Bitter End / Their decision to leave Doctor Who / Would RTD ever return to Doctor Who? / Writing the regeneration.
Click here to listen to the 15 minute MP3.