'Doctor Who' reveals classic villain as The One Who Waits in the 'Legend of Ruby Sunday'

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...