aside from its brilliant portrayal of alien beings and an alien ecosystem, scavengers really gets me because it makes me think of the sheer amount of observation, trial and error it would have taken fr these two humans to orchestrate this event and bring about the desired conclusion. and that being just a few seconds of consciousness on earth with their fellow humans. and even after having seen it three times, i'm just now noticing that the progress is cyclical. that the final piece of the puzzle is the first piece of the next puzzle.