The true identity of Susan Twist’s Doctor Who character is finally revealed in season 14’s episode, “The Legend of Ruby Sunday,” and the answer is pretty far removed from many of the theories that were popularized by portions of the fan base.
Twist’s ongoing presence in Doctor Who‘s Disney era was one of its biggest mysteries, with her first role coming in “Wild Blue Yonder” as Mrs. Merridrew – Isaac Newton’s maid. Now that the secret is out in the open, the speculation can cease. However, the reveal doesn’t immediately answer every question about Twist’s real Doctor Who character. 
A Complex Puzzle
Susan Twist, under various appearances, had viewers intrigued yet baffled throughout the season. According to Wiretap Editors,The sheer lack of connection between Twist’s various appearances made it incredibly difficult to solve the mystery
. This complexity added layers to her character.
A Surprising Reveal
Susan Twist’s true identity unveils in a pivotal moment: she is Susan Triad, an avatar for Sutekh. This revelation comes during a crucial speech at the United Nations where she describes her S Triad Technology.
Former companion Mel was undercover on Susan’s media team, collecting DNA samples that appeared human.
Despite no alien traces in her software, the Doctor remains suspicious due to the anagram similarity between S Triad and TARDIS.
Manipulation by Sutekh
Susan has been heavily influenced by Sutekh, leading to her physical transformation. When Colonel Winston Chidozie investigates further, he encounters something ancient and malevolent. As Ruby and others watch through the Time Window,Chidozie tragically meets his end, turning into a dust-covered corpse.
I am returning
, echoes Susan during her speech as she transforms into a being with red eyes, marking Sutekh’s return.
The reveal brought back Gabriel Woolf as the voice of Sutekh from Classic Who’s 1975 serial Pyramids of Mars.
The Mystery Deepens
This episode raises more questions for fans of Doctor Who. Why did Susan need to be scattered across time and space? What role does this altered TARDIS play?
I bring Sutekh’s gift of death for you and for all in your tiny vile incessant universe
, Sutekh speaks through Susan Twist, adding significant tension for what’s next.
No doubt fans will eagerly await how the Doctor handles a seemingly undefeatable foe, leaving questions up in the air until next week’s cliffhanger resolution.
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