A fellow Gallifreyan, The Master has been a thorn in the Doctor's side throughout his history. David Tennant, John Simm, Derek Jacobi and other cast members talk through their favourite Master moments and pinpoint some of their finest showdowns.

A temp from Chiswick-turned-saviour of the universe, Donna Noble saw it all - from Planet of the Ood to old Pompeii. David Tennant, Catherine Tate and other key cast share their favourite Donna delights and talk about the most memorable moments of her journey through time and space with the Doctor.