Doctor Who: Flux started with a bang as the titular Flux ravaged the universe, but a single line of dialogue just put the apocalyptic force on the back burner. The 13th season of Doctor Who, known as Flux, tells a single story across six episodes. It’s the final season produced under showrunner Chris Chibnall, with both he and lead actress Jodie Whittaker leaving the series in 2022.
Season 13, Episode 1, “The Halloween Apocalypse” revealed the titular Flux as a mysterious wave of energy
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