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The replacement of Millie Gibson's character was officially reported by the UK's Mirror. The new companion for the Doctor will be played by Vera Setu, an actress recognized for her work in Andor and Jurassic World Dominion. The decision to replace Gibson was seemingly made during the filming of the first season, with insiders reporting she will not appear in the upcoming Christmas special or beyond.
Shudging gwa shared a cryptic post hinting at the change, posting an image with his astrology sign, Gemini, along with a heart emoji. The move appears to be part of a broader reshuffling of the cast, with insiders claiming that the show's new direction under Russell T. Davis involves significant revamps—possibly to regain viewers or reset the narrative.