Anomaly (unproduced home video)

File:Anomoly BluRay cover.jpg

The "concept art" cover for the film.

Anomaly, stylized as Aᴎomaly, is a currently unproduced spin-off film which was first announced in 2019. Although not officially cancelled, the film has missed its intended release date of 2021 and little information is available about the state of the project.

The film was intended as a sequel to the 1995 film Downtime and the 2004 film Dæmos Rising, featuring the return of Beverley Cressman as Kate Lethbridge-Stewart and Miles Richardson as Douglas Cavendish. The film also would have established the Kate Lethbridge-Stewart seen in Reeltime Pictures' Downtime and the Kate Stewart seen in BBC's The Power of Three onwards as distinct from each other. Although Keith Barnfather also indicated that the film would be set "before Kate joins UNIT in Doctor Who. Alongside this, the film would have been a sequel to the 1972 Doctor Who television story The Time Monster.

Production on the film was put on pause when the decision was made to focus on Sil and the Devil Seeds of Arodor instead. Concept art of the film indicated that Sophie Aldred was meant to appear in the story. Ironically, Aldred would instead appear in the 2022 Doctor Who television story The Power of the Doctor, which featured the BBC incarnation of Kate.

As of February 2023, Barnfather still believe the film was "soon to be made."

Contradicts with Doctor Who

Despite Anomaly's effort to make the BBC and Downtime Kate Stewarts separate characters, BBC-produced stories have provided evidence they are indeed the same character

• In the novelisation of The Star Beast, Kate's middle initial "S" is mentioned, referencing Downtime: Child of the New World.
• In the television story The Giggle, Kate makes reference to battling Yetis, much like she did in Downtime.