The 48-year-old actress first portrayed the character on season eight of the BBC series, and will return for the first two episodes of season nine. Missy is a female incarnation of the villainous Master, a rebel Time Lord and archenemy to the Doctor (Peter Capaldi).
Gomez announced the news in a video Thursday on Twitter, and told the BBC, "Things have been a little beige since I left Missy behind, so I'm delighted to be putting my Lippie back on. I'm positively dying to see the doctor again!"
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