Doctor Who (Tv series) - Season 1 - Episode 9

the Thirteenth Doctor, along with her companions Yaz and Dan, confronts a universe-threatening anomaly known as the "Flux." Their journey takes them through time and space, battling formidable foes like the Sontarans while unraveling deep-seated secrets from the Doctor's past. As they navigate perilous challenges, they encounter historical figures and face moral dilemmas, ultimately striving to save humanity from impending doom.