31 October (production)


 * 1965 - David Whitaker's contract ended, precipitating the first formal transition between script editors. Dennis Spooner's tenure thus began.
 * 2005 - Rewrites for The Christmas Invasion known as a "goldenrod revision" and of New Earth known as a "salmon revision" were made. These amended Invasion's pre-titles, the introduction to the Sycorax, the Tenth Doctor choosing his outfit and the TARDIS arriving at Lady Cassandra's party. (DWMSE 14)
 * 2007 - Whilst filming was underway on Partners in Crime, actor Howard Attfield died, requiring the scripts to be rewritten and eventually resulting in the casting of Bernard Cribbins as Donna's grandfather.