After leaving Miami, Belinda and the Doctor need to go on another adventure to pinpoint their way home. However, few missions in the modern era have felt quite as dangerous as “The Well,” a fun episode that immediately draws comparisons to space horror films like Aliens and Event Horizon (through the lens of Doctor Who monster episodes). “The Well” also has some surprises waiting for long-time Who fans, with a brilliant turn.

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Belinda (Varada Sethu) describes her family’s typical Friday night. She’s nervous that if the Tardis cannot bring her back, her parents and life are gone forever. The Doctor (Ncuti Gatwa) counters, telling her that he plans to meet her parents in person. They need to take another Vindicator reading, and with every reading, they are closer to getting Belinda home. This time,...