(2004) Provided a commentary for the Doctor Who (1963) DVD "Ghost Light".
(2012) Moderated the commentary for the Doctor Who (1963) DVD "Dragonfire".
(2013) Moderated the commentary for the Doctor Who (1963) DVD "Terror of the Zygons".
(2012) Provided a commentary for the Doctor Who (1963) DVD "The Greatest Show in the Galaxy".
(2011) Moderated the commentary for the Doctor Who (1963) DVD "Paradise Towers".
(1988) Single: "The Psychic Circus". Words and music by Christopher Guard, performed by "Who's Who". Vocals: Christopher Guard, Jessica Martin, T.P. McKenna. Guitars: Stuart Walton. Keyboards and programming: Mark Ayres. Produced by Mark Ayres.
(2012) Moderated the commentary for the Doctor Who (1963) DVD "Planet of Giants".