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After killing two UNIT guard with her device, Missy told a third guard she dubbed "Sweaty One" to get on his knees and get ready for "a goodbye selfie for [his] kids" before she tried to blast him. (TV: The Magician's Apprentice)
After the Doctor had explained to Bill and Nardole his reasoning behind trying to redeem Missy, the latter thought the Doctor to be "having an emotion" and took a selfie with him to commemorate the occasion. (TV: World Enough and Time)
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