Doris Lethbridge-Stewart (née Bryden, formerly 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. (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)
During their last encounter, Doris and Alistair conceived a child. Doris wrote a letter to Alistair to tell him that he had a son, but after learning about Alistair's engagement to Sally Wright, she chose to not send the letter and raise the child on her own when he was born. Her son, Albert, was born in 1969. (The Enfolded Time)
In the early 1970s, Doris married George Wilson, the brother of Barbara Smith, Sarah Jane Smith's mother. George took on Albert as his own son (PROSE: The Enfolded Time), and a couple of years later Doris and George had a daughter, Pamela. (Lucy Wilson & the Bledoe Cadets) 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)
Alistair went sailing on their boat one Christmas when he found Susan Foreman in the middle of the water. He took her back to their house and Doris helped to care for her. Not long after, 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)
In 2001, while Alistair investigated things at Lanyon Moor, Doris visited relatives in Devon. (The Spectre of Lanyon Moor)
In 2005, her sister was ill and Doris spent some time with her. (Time Heals)
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)