9 March (production)


 * 1970 - Jon Pertwee signed on for another twenty-five episodes after Inferno.
 * 1981 - Christopher H. Bidmead was commissioned to write an outline for TV: Castrovalva, the replacement to the recently cancelled Project Zeta Sigma.
 * 2006 - Recording for Murray Gold's The Impossible Planet/The Satan Pit orchestral score was completed at Air Studios. (DWMSE 14)
 * 2009 - Recording for The Nightmare Fair took place at The Moat Studios.