Darsteller und CrewJacques TourneurRegisseur:inEmmett VoganPierre Curie (uncredited)Margaret BertNurse (uncredited)James ConatyAmerican Scientist (uncredited)Pete SmithNarrator (voice)André CheronHenri Antoine Becquerel (uncredited)Richard GoldstoneSchreiber:inEddie HartPhotographer (uncredited)N. Gayle GittermanSchreiber:in