Evolution (2001) Part I- "They've Evolved into Primates."

Spoiler Level – Low-to-moderate

Contagion (2011) - "We Have a New R0"

Spoiler Level – Low-to-moderate

The Walking Dead S1E6 (2010) - "No Clinical Progress to Report"

Spoiler Level – Low

A Note on Zombies

My feelings on zombies are pretty much the same as my feelings on superheroes. Later, I'll probably explain why I want these same rules to apply to vampire, werewolves, and anything else that's supernatural.

Zombies, as they are traditionally conceived, are not scientifically possible. The dead cannot walk around and attack the living. When the heart is no longer beating and blood is no longer pumping, the muscles won't get the oxygen they need to produce the energy for movement. The brain won't have the energy to tell the muscles to move. Dead is dead. No plague or radiation source or anything else can change that.

Gattaca (1997) - "You Could Go Anywhere with This Guy's Helix Tucked Under Your Arm"

Spoiler Level – Moderate