Together with designer Richard Lewis, Segal and Leekley prepared an expensive and extensive series bible -- titled The Chronicles Of Doctor Who?, to introduce Doctor Who in general, and the proposed new series in particular. Segal had envisioned this version of Doctor Who as being largely divorced from the original BBC series -- although the basic concepts of Doctor Who were adhered to, the programme's mythos would be completely rewritten. The bible was written from the perspective of Cardinal Barusa (a misspelling of Borusa, a character who had first appeared in Season Fourteen's The Deadly Assassin).
It introduces the Doctor and the Master, who are half-brothers and both sons of the lost Time Lord explorer Ulysses, Borusa's son. When the evil Master becomes President of the Time Lords upon Borusa's death, the Doctor flees Gallifrey in a rickety old TARDIS to find Ulysses. Borusa's spirit becomes enmeshed in the TARDIS, enabling Borusa to continue to advise his grandson. The Doctor takes the TARDIS to "the Blue Planet" to search for Ulysses, this being the native world of the Doctor's mother.
The bible went on to detail the Doctor's encounter with the Daleks—still creations of Davros, but now controlled by the Master. These events, clearly inspired by Season Twelve's Genesis of the Daleks, would have formed the bulk of the pilot episode. Various other possible adventures are detailed, most of them drawing, to a greater or lesser extent, on stories from the original series:
The Smugglers,
The Talons of Weng-Chiang,
Earthshock,
Horror of Fang Rock,
The Celestial Toymaker,
The Gunfighters,
Tomb of the Cybermen,
The Abominable Snowmen,
The Ark in Space.
Others excised from the final draft included adventures inspired by
The Sea Devils,
The Invasion of Time,
The Reign of Terror,
The Claws of Axos,
The Dæmons,
Shada
Many familiar Doctor Who monsters were extensively revised.
The Daleks were hideous mutant creatures whose travelling machines appearing not unlike those from the original series, albeit without a "head" region or external appendages -- opened up into a spider-like design.
The Cybermen, now called "Cybs", were marauders whose cybernetic parts were culled from a variety of sources, giving them a patchwork appearance (though they were still vulnerable to gold dust).
The Yeti are gentle descendants of the Neanderthals.
The bible concluded with the conclusion of the Doctor's adventures, in which he locates Ulysses and travels back to Gallifrey to depose the Master and become President.
The bible was completed around the end of March. Leekley then began work on sample storylines, with most work concentrating on the revised version of The Gunfighters, now called Don't Shoot, I'm The Doctor. This was similar to the original Season Three serial only in broad sketches; the Doctor does travel to Tombstone suffering from a toothache, but the rest of the story hewed much more closely to the true events of the OK Corral, as opposed to the more fictionalised version offered in the original Doctor Who story. As well, the idea at this point was for the new episodes to be made for one-hour American time slots (meaning about forty-five minutes of actual programming).