Doctor Who Season 23 (in-universe)

Doctor Who Season 23 was the twenty-third of twenty-four seasons of Doctor Who, as evidenced by Melanie Bush's copy of Doctor Who The Collection Season 24, that was given to her by the Seventh Doctor. (WC: 24 Carat)

Colin Baker was once put on trial for an unpaid parking fine, which he tried to justify by explaining that he had been filming ten hours of new bonus material for Doctor Who Season 23, which included updated special effects and extended versions of every episode, as well behind the scenes material such as The Writers' Room: The Missing Season 23, The Doctor Who Cookbook Revisited, and The Doctor's Table: Season 23.

Despite providing evidence from the Matrix on his iPad to back up his claims, Baker was put away with Nicola Bryant. (WC: The Trial)

Behind the scenes
This is a version of the twenty-third season of Doctor Who that exists within the Doctor's universe.