Susan Triad was the founder and head of Triad Technology, which UNIT used in the year 2023. (TV: The Giggle [+]Russell T Davies, Doctor Who 60th Anniversary Specials (BBC One and Disney+, 2023).) Unknown to her, she was created as one of Sutekh's "angels of death", and would become one of his servants when the time came. After Sutekh's defeat, Susan was freed and accepted an offer to join UNIT. (TV: Empire of Death [+]Russell T Davies, Doctor Who series 14 (BBC One and Disney+, 2024).)
Biography[]
Susan Triad was created when the Doctor's TARDIS landed in the year 2024. Sutekh, who had latched onto the TARDIS, used the power of his mind and the TARDIS' perception filter to retroactively bring Susan into existence, to act as an "angel of death" in his plot to destroy all life. The Doctor's having landed on Earth over 100 times allowed Sutekh to use the perception filter to grow Susan into a figure of monumental importance to the entire world. (TV: Empire of Death [+]Russell T Davies, Doctor Who series 14 (BBC One and Disney+, 2024).)
Susan grew up as an ordinary woman living on Earth through the late 20th century. She came from a poor background but her parents, her father a postman and her mother a dinner lady, worked hard to make a good life for her. Inspired by them, she set about working hard herself to give back to the world. By the 2020s, she had created Triad Technology and developed a way to give it to people for free. Her breakthrough year was 2022, when Space Magazine reported that it was "Her year and only her year". She became an international sensation, featuring in multiple interviews, television shows and magazines and was due to address the United Nations in 2024. Two months before she announcement, she changed the name of Triad Technology to S Triad Technology. According to her, everyone called her "Sue." However, she began struggling to sleep, finding herself dreaming of living life as other people across time and space.
However, UNIT grew suspicious of her, with Kate Stewart deploying Melanie Bush as an undercover agent on Susan's PR team to monitor her. The Fifteenth Doctor and Ruby Sunday grew curious as well because they noticed Susan's face in various people they met during their travels. (TV: The Legend of Ruby Sunday [+]Russell T Davies, Doctor Who series 14 (BBC One and Disney+, 2024).) Throughout time and space many different people looked identical to Triad; in one instance, Mrs. Merridew a maid of Isaac Newton in 1666 who shared Traid's appearance, missed encountering the Doctor in their fourteenth incarnation when the TARDIS crashed into a tree as she was preoccupied with sweeping the ground. (TV: Wild Blue Yonder [+]Russell T Davies, Doctor Who 60th Anniversary Specials (BBC One and Disney+, 2023).) In their fifteenth incarnation, both the Doctor and Ruby began encountering different people who all looked like Triad; particularly a woman watching a concert at Christmas 2023 (TV: The Church on Ruby Road [+]Russell T Davies, Doctor Who Christmas Special 2023 (BBC One and Disney+, 2023).), Gina Scalzi (TV: Space Babies [+]Russell T Davies, Doctor Who series 14 (BBC One and Disney+, 2024).), a Tea Lady from 1963 (TV: The Devil's Chord [+]Doctor Who (BBC One and Disney+, 2024).), the face of the AI of the Villengard Ambulance (TV: Boom [+]Steven Moffat, Doctor Who series 14 (BBC One and Disney+, 2024).), a Hiker visiting Wales (TV: 73 Yards [+]Russell T Davies, Doctor Who series 14 (BBC One and Disney+, 2024).), Penny Pepper-Bean (TV: Dot and Bubble [+]Russell T Davies, Doctor Who series 14 (BBC One and Disney+, 2024).), the portrait of the Duke of Pemberton's mother (TV: Rogue [+]Kate Herron and Briony Redman, Doctor Who series 14 (BBC One and Disney+, 2024).), a Sloogma on the planet Sloog, a Griffin on the planet Varsitay, and a Bleet on The Fivefold Configuration. (TV: The Legend of Ruby Sunday [+]Russell T Davies, Doctor Who series 14 (BBC One and Disney+, 2024).)
UNIT and the Doctor speculated, based on her first initial and surname (S. Triad) being an anagram for TARDIS, that she might have been the Doctor's granddaughter, Susan, but regenerated. Despite the risks to his own personal timeline, the Doctor allowed Mel to introduce him to Susan. While not convinced she was his granddaughter, the Doctor believed she was connected to their ongoing problem with an entity that had enveloped the Doctor's TARDIS.
Susan Triad as Sutekh's vessel. (TV: The Legend of Ruby Sunday [+]Russell T Davies, Doctor Who series 14 (BBC One and Disney+, 2024).)
As Susan began her announcement live on air to the world, she was suddenly consumed by her memories of being the other people in her dreams and collapsed. The Doctor and Mel approached her, only for the God of Death, Sutekh, to manifest and reveal it had all been a trap; Susan was not the Doctor's granddaughter but actually a servant of Sutekh himself. He took her over and then disintegrated her assistant Bailey, reaching out to the Doctor, saying she would bring Sutekh's gift of death to all life in the universe. (TV: The Legend of Ruby Sunday [+]Russell T Davies, Doctor Who series 14 (BBC One and Disney+, 2024).)
Susan as an "Angel of Death". (TV: Empire of Death [+]Russell T Davies, Doctor Who series 14 (BBC One and Disney+, 2024).)
Following her involuntary transformation, Susan released Sutekh's Dust of Death over the Earth, wiping out all life other than the Doctor, Ruby and Mel. As one of the "angels of death" she was forced to endure a "wretched half-life" which she wished for Sutekh to end once he had extinguished all other life. When Sutekh was defeated, Susan returned to being a normal human and was offered a job with UNIT, despite Colonel Ibrahim advising her not to make the tea. (TV: Empire of Death [+]Russell T Davies, Doctor Who series 14 (BBC One and Disney+, 2024).)
