Are the 2005 & newer Doctor Who scripts all new material?

Question

Are the 2005 & newer episodes of Doctor Who fresh scripts, or were some of the scripts from older seasons rewritten for new viewer education since the Doctor Who series rebooted?

Answer 1

None of them are direct rewrites of older TV episodes, but some of them are rewrites of expanded universe material written by the same authors. For example:

• The "Human Nature"/"Family of Blood" two-parter from season 3 started as a tie-in novel also called Human Nature.
• "A Christmas Carol", the season 5 Christmas episode, is a reworking of Steven Moffat's earlier short story "Continuity Errors."
• "The Lodger," also from season 5, may or may not qualify -- it's a rewritten version of a comic strip, but the original comic strip was already post-reboot.

Answer 2

A couple of stories from the new TV series were rewritten from Big Finish audio stories as well:

• "Dalek" was adapted from "Jubilee"
• "The Age of Steel"/"Rise of the Cybermen" were inspired by "Spare Parts"