Doctor Who fan and showrunner Russell T Davies wanted to bring back Sutekh, a classic villain from the Tom Baker era of the show. So he invented "Sue Tech" — a.k.
a. tech CEO Susan Triad, the final form of Davies' season-long Susan Twist mystery . That's what millions of other Doctor Who fans discovered in the final minutes of the show's tense pre-finale episode "The Legend of Ruby Sunday.
" With the distraction of trying to discover Ruby's mother, a red-herring anagram (S TRIAD, too obviously TARDIS) and the bombshell question of whether Susan Triad was a regeneration of his granddaughter Susan, the Doctor (Ncuti Gatwa) failed to notice one of his ancient and most powerful enemies has wrapped himself around the TARDIS — a machine this villain has manipulated before. Welcome back Sutekh, a fan favorite Doctor Who villain who previously only appeared in one story nearly 50 years ago, and now also the Jeopardy ! question to the answer "this character was revealed to be The One Who Waits." Sutekh the Destroyer is the villain of the 1975 story "Pyramids of Mars," an iconic Tom Baker tale from one of the show's most gothic horror-filled seasons.
And it didn't get more 1975 gothic horror than an ancient Egyptian god (Sutekh, also known as Set) who turns out to be a genocidal alien imprisoned on Earth by his people, the Osirans. Sutekh was kept in check by signals from a radio beacon in a pyramid on Mars. How those signals worked exactly, especially given that Mars is sometimes on.