Film did not fully exploit its potential

Rating: Null/10 (15 March 2016)

I can only rate it as 6/10. It has a scifi plot, with the human interest element of the three-persons-in-a cell drama.
First, the cast did an adequate job though Goodman overplayed the lunatic. Mary Winstead photographed well. There was some good dynamics of the three people hunkered down. The aliens appeared briefly at the end and was credible.
However, I feel that the dynamics of the three-persons needed to be explored further. Shifting alliances etc. In addition, I would have liked to see a stronger transformation of the heroine from scared young woman to fighter. After all, she survives a harrowing experience and chooses to drives towards danger.
The plot had a great deal of dramatic potential, but this film did not fully deliver.