Judson

Dr Judson was a mathematician who worked on the ULTIMA project during World War II.

Early life
Educated at school with the future Commander Millington during the second decade of the 20th century the two became close friends for the next thirty years.

However, for most of that period it was a relationship that became increasingly bitter. Judson suffered a terrible accident in the 1920s that left him confined to a wheelchair. Millington kept watch over his friend, later claiming to have "given him everything", but Judson's dependency eventually developed into a cynical mutual loathing between the two by the dawn of World War Two twenty years later.

By that stage, Judson had, despite his setbacks, become a brilliant mathematician and developed the ULTIMA Machine, a complicated device capable of deciphering German naval codes. He was assigned to a military base under the command of Millington and in the care of Nurse Crane - in Northumberland. While the machine proved crucial to the British war effort, Judson himself became increasingly obsessed with local carvings in the nearby church crypt of St. Jude's at Maiden's Point. (DW: The Curse of Fenric)

The coming of Fenric
The arrival of the the Doctor in 1943 brought Judson's obsession and instability to a head. Millington, also increasingly unstable and convinced in the reality of the local Viking myths - used the ULTIMA machine to decode the final inscription on a flask holding the trapped remains of Fenric. This triggered the entity's release and in a flash of electrical current transmitted its being into Judson, killing him, but keeping the body alive.

Using Judson's body to organise the reawakened Haemovores, Fenric eventually discarded it when it proved too weak to sustain a mental challenge; in the form of a chess puzzle, set by the Doctor as part of the renewal of their thousand year contest. The body - and the final remains of Judson - are destroyed during a final explosion at the base. (DW: The Curse of Fenric)