Work on “A Small Light” began six years ago, after its showrunners Joan Rater and Tony Phelan, a married couple who used to be producers and screenwriters for “Grey’s Anatomy,” visited the Anne Frank House in Amsterdam. Walking around the museum and listening to tour guides, they learned that many people don’t really know the story of the Frank family anymore, let alone the story of the people who helped them, Rater and Phelan said in a recent video interview. Since then, they said, the moral question at the heart of Gies’s story — whether to do the right thing, the wrong thing or nothing at all — has only become more important, given how war, nationalism and antisemitism have once again been spreading across Europe. She finds employment with Otto Frank (Liev Schreiber) — a stern, fellow German-speaking immigrant — and meets her future husband, a social worker. Much of the first episode follows Gies living life as a modern young woman, meeting friends and going out dancing.

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