The Deca was a group of ten young and rebellious Gallifreyans at the Prydonian Academy, which included the First Doctor. ( AUDIO: )
The Rani Elite
Fifth Doctor had a dream about the Deca in which he was still in his first incarnation and back on Gallifrey. ( PROSE: )
The group represented the top rank of students in their class, (
PROSE: ) despite the fact that the Doctor was said to have not excelled academically. ( Divided Loyalties TV: )
The Ribos Operation
Within a nightmare produced by the Celestial Toymaker, the Doctor saw that of the group,
Ushas (later known as the Rani), Vansell and Rallon had nearly completed their courses. Rallon was, however, at some point, taken over by the Celestial Toymaker.
Millennia was forcibly made part of the Celestial Toyroom. The Master (then named Koschei), the Monk (then known as Mortimus), the Rani (formerly known as Ushas), the War Chief (originally Magnus), Drax, and the First Doctor eventually took up lives as renegade Time Lords.
Jelpax and Vansell went on to hold down conventional roles in Time Lord society. ( PROSE: )
The former became
Coordinator of the APC Net and the latter went on to head the Celestial Intervention Agency. ( AUDIO: )
The Sirens of Time
Of the members in the nightmare, only Drax, Theta, "Koschei", Mortimus, and Ushas were elsewhere confirmed to have been members. (
The Quantum Archangel