Doctor Who: 14 Cool Details Revealed In Steven Moffat's Eleventh Hour Commentary
2. The TARDIS Exterior Was Inspired By The Peter Cushing Movies
The TARDIS gets a fresh coat of paint in Series 5, going from the darker blue of the Tennant era to a much more vibrant blue, fitting of Matt Smith's more whimsical Doctor.
Near the end of the commentary, Willis recalls that Moffat and production designer Edward Thomas had "a lot of conversations" about the updated look of the box's exterior, with Moffat specifically requesting that much brighter blue.
The writer cites the non-canon Peter Cushing Dr. Who movies as the inspiration behind this choice, claiming that he "loved" the "very very blue" look of this particular TARDIS.
We have to agree with Moffat on this one - this TARDIS looks sleek as hell.