Day Zero - Pilot Episode - "Lethal"

Blake Edwards' (Richard Scott Dean) hand is forced when the other survivors stop tolerating his drug habit. Frustrated by the inability to comprehend the situation, Blake engages in taking on the radiation-infected hybrids alone.

Day Zero

The Earth has been mostly destroyed as a result of World War IV (Day Zero). Radiation and fallout from the global attacks affected most of those who survived, regressing them into a primitive-like state. The fairly scattered, infected "Hybrids" hunted down and killed nearly all of the remaining unaffected humans. A group of survivors in Utah are left to fend for themselves against both Humans and Hybrids.