A Question Of When, A Question Of Where

The spacecraft malfunctioned and crashed on the primitive world. But questions abound... Is this our ancient past? Or is it in some distant future where a human spacecraft crashes on an Earth like planet still in its primitive stages of development? Might it even be a visitor from our own future, gone back to the past to study the times and had disaster strike?

Then there comes the hapless visitor herself. Is the caveman her savior or her tormentor? Does he consider her a potential mate or a potential meal? If the former, is she perhaps the advanced DNA that got spliced into us... was she the missing link and the mother of humankind as we know it?