BBC Radio 2 will be presenting a new documentary special, Doctor Who: Regeneration this December, Outpost Gallifrey has learned. The new documentary from the radio channel, which earlier this year presented the two-part documentary "Project: WHO", "examines how this year's adventures of the Time Lord became the most talked about television event of 2005. Just how significant was the departure of Christopher Eccleston to the programme and its production team? Has the success of 'Doctor Who' changed the battleground of Saturday night television? And is the TARDIS safe in David Tennant's hands?" The documentary features new interviews, exclusive music by "Doctor Who" composer Murray Gold, and excerpts from the new series, and "tells a fascinating story of why it took forty-two years to become the nation's most popular drama series." Key interviewees include David Tennant, Billie Piper, Russell T. Davies, Julie Gardner, Phil Collinson, Murray Gold, Alison Graham of Radio Times, BBC1 Controller Peter Fincham, Jane Tranter, Camille Coduri (Jackie Tyler), Noel Clarke (Mickey), Penelope Wilton (Harriet Jones), directors James Hawes and Euros Lyn, and others. Written by Brian Sibley and produced by Malcolm Prince, the documentary airs on BBC Radio 2 on Tuesday 20 December at 8:33pm.