I think this might be a new one, at least, I hadn't heard of it.
From the BBC site:
Using rare archive, audio recordings and interviews, this film is a bewitching after-hours trip through the surreal, moonlit world of Waits' music - a portrait of a pioneering musician and his unique, alternative American songbook.You can watch it on BBC4 on Sunday, Feb. 19 at 9 pm or Tuesday, Feb. 21 at 1.25 am or online 'shortly after the broadcast' (geographical restrictions might apply).
According to Boards.ie the programme contains 'contributions from Terry Gilliam, Ian Rankin and Ute Lemper'.
IMDB.com lists Ralph Carney, Marianne Faithfull, Guy Garvey, Terry Gilliam, Ed Harcourt, Barney Hoskins, Bones Howe, Ute Lemper, Ian Rankin and Jim Sclavunos as 'the cast'. The director is James Maycock.