Doris Lethbridge-Stewart, née Doris Bryden, and Doris Wilson while married to George Wilson, was the mother of Alistair Gordon Lethbridge-Stewart's son Albert Wilson. She was also the stepmother of Kate Stewart and the step-grandmother of Gordon Lethbridge-Stewart.
Doris first met Alistair at Brighton in the mid-1960s and had a brief but passionate romance. It ended amicably when Alistair was sent overseas. Their relationship seemed to have been sexual. (TV: Planet of the Spiders, COMIC: The Warkeeper's Crown) During this time, Doris gave Alistair a watch.
Major Walter Douglas was one of the few people who could get away with joking about the fling to Lethbridge-Stewart. One such joke made the Brigadier uneasy about going to Brighton with his fiancée. (PROSE: The Forgotten Son)
In the early 1970s, Doris married George Wilson, the brother of Barbara Smith, Sarah Jane Smith's mother. Around this time, Doris had a child she named Albert Wilson; Albert's father was not George, but Alistair. Doris wrote a letter to Alistair to tell him that he had a son, but she never sent it. (PROSE: The Enfolded Time) Within a few years of their marriage, George was killed in Northern Ireland. (PROSE: The Scales of Injustice, The Enfolded Time)
Through this, Alistair met Doris again and they eventually married. (TV: Battlefield, PROSE: A Romantic Evening) They lived in a large house in the country. She took an immediate liking to both her husband's latest successor, Brigadier Winifred Bambera, and to Ace McShane. (TV: Battlefield)
Doris had relatives in the South West of England. In 2000, she visited the in-laws up in Devon, while Alistair went to Lanyon Moor, officially on holiday; unofficially, he doing under-cover work for UNIT. At this point, she and the Brigadier had also intended to go to Greece for a while. (AUDIO: The Spectre of Lanyon Moor)
Doris and Alistair went sailing on their boat one Christmas when they found Susan Foreman in the middle of the water. They took her back to their house and were surprised to find that the First Doctor came looking for her. The Doctor pretended not to know who she and Alistair were, but after Alistair left, the Doctor confided in Doris that he knew who they both were the whole time. The Doctor left shortly after this conversation before Alistair returned. (PROSE: The Gift)
While they were boating in the early 2010s, the Lethbridge-Stewarts' boat capsized and Doris drowned. His grief over this loss left the Brigadier nearly suicidal for a time, but he eventually moved on from his loss as he accepted that life was dear because it wasn't permanent and that he would never sacrifice what he had with Doris simply to escape the pain he was feeling now. (PROSE: The Shadows of Avalon])