Kaldor City is a series of audio plays using elements from the British TV series Doctor Who and Blake's 7. Many of the elements borrowed from these series for use in Kaldor City were originated by Chris Boucher, who wrote for Doctor Who and was script editor for all four seasons of Blake's 7. The series, produced by Magic Bullet Productions, was released on CD beginning in 2001.

Blake's 7 is a British science fiction television programme produced by the BBC. Four 13-episode series were broadcast on BBC1 between 1978 and 1981. It was created by Terry Nation, who also wrote the first series, produced by David Maloney and Vere Lorrimer, and the script editor throughout its run was Chris Boucher, who wrote nine of its episodes. The main character for the first two series was Roj Blake, played by Gareth Thomas.