Bass, Backing Vocals, Vibraphone – Chris Wolstenholme
Cello – Caroline Lavelle
Drums, Percussion – Dominic Howard
Engineer – John Leckie, Ric Peet (tracks: B1, B2, C1 to C3, D2, D3), Steve Cooper (3) (tracks: A1, A2, B3, D1)
Engineer [Assistant] – Claire Lewis, Damon Iddins, Mark Thomas (6), Mirek Styles*
Executive-Producer – Dennis Smith (3), Safta Jaffery
Mastered By – Ray Staff
Mixed By – John Cornfield, Muse
Producer – David Bottrill (tracks: A1, A2, B3, D1), John Leckie (tracks: B1, B2, C1 to C3, D2, D3), Muse
Programmed By – Chris Brown (8) (tracks: B1, B2, C1 to C3, D2, D3)
Viola – Clare Finnimore
Violin – Jacqueline Norrie, Sara Herbert
Vocals, Guitar, Keyboards, Arranged By [Strings] – Matthew Bellamy
Written-By – Matthew Bellamy (tracks: A1 to D1, D3)