I love this series. It would be cool if he kept seeing someone. Someone short with a gas mask on completely concealed by their gear so he couldn't tell if they were guy or girl, adult or child. So the guy would keep catching glimpses of this stranger and seeing the stranger standing across the street on the opposite rooftop type placements. But he would never be able to catch up to them so he's not sure whether he's hallucinating or not. Then later it would turn out it's a real person, a girl who is super stealthy and lethal. Then they team up and make a badass base. And she shows him how to be self sufficient and hunt and gather as well as be sneaky.
at 25:47 but then I had to cry. It was played really well, just like a film, just awesome The policeman who dies fought until the bitter end and gave his life for the group