Marie Curie: More Than Meets the Eye (1997)

During World War 1, the young Boudreau sisters decide to aid the war effort by catching spies. The strange activities of Nobel-Prize winning scientist Maria Skłodowska-Curie make her a prime suspect. When the girls follow Curie to the battlefront, they witness her fight to use science and her X-ray machine to save the lives of the wounded, including their father.