Unknown World

Unknown World is a 1951 science fiction film. It opens with a newsreel view of a mushroom cloud. In that newsreel we're introduced to several scientists including a female medical doctor described as an "ardent feminist".

You can watch it at Internet Archive, and Googlevideo also has it online:


TCM has an overview. Beckoning Chasm has a scene-by-scene description, including some verbatim dialog. SciFi.com has a review that says that

fans looking for a campy and comparatively compelling cinematic experience should find it amusing and appealing.

I did not find it campy, just boring, and I disagree with the suggestion that it could be considered "compelling" in comparison to anything.