Watch the emotional moment where Clark holds Lois in the rain as the cure begins to take effect:

: Dr. Hamilton discovers that an antidote requires blood from a Kryptonian . Clark risks exposing his identity to Zod by donating his blood to save the city.

: The virus is released into the air, quickly infecting the city. Tess Mercer is one of the first victims, leading Clark Kent and Dr. Emil Hamilton to investigate.

: Lois Lane is bitten and begins to turn while trapped at the Daily Planet . Oliver Queen , struggling with his own personal downward spiral, arrives to help but is hesitant to fully return to his Green Arrow persona.

In the Smallville episode (9x03), Metropolis is struck by a zombie-like virus . The virus, created from Kryptonian enzymes by one of Major Zod's soldiers, transforms infected humans into aggressive "rabid" creatures within hours. Key Plot Points