Therefore, its known narrative elements are not a part of the Doctor Who universe as we, on this Wiki, choose to define it. It may have been the basis for a similar story in another medium, however — and that story may indeed be valid.
The Celestial Toymaker was a story concept in John Leekley's series bible for Amblin Entertainment's proposed 1990s Doctor Who television show. It was based on the First Doctor serial The Celestial Toymaker.
In 2525, the Tardis is pulled into the Toymaker's fantasy world. The Doctor must win his freedom from eternal imprisonment by playing a deadly mind game. Meanwhile, Borusa discovers that the Toymaker is being controlled by the Doctor's evil half-brother, the Master.
- In an earlier draft of the summary, written 21 March 1994, Borusa identifies that the Toymaker's domain is a time vortex controlled by the Master, rather than the Master controlling the Toymaker directly.