ReGenesis

A deadly virus is headed straight for the city; a scientist deals with the unexpected arrival of his teenage daughter.

Norbac finds "patient zero," and the hard part is that she is a baby.

Lilith and Mick break into his father's office to find evidence for David that he has been cloned.

NorBAC investigates an outbreak of prion disease in humans; the victims are spread out across North America.

An agribusiness may be selling infected chickens; David tries to convince Owen to stop gene therapy.

An experimental treatment is being used on children with leukemia; Mick and Lilith go whale-watching in Quebec.

Carlos wants to help a friend dying of AIDS to participate in cutting-edge research.

A power blackout leads to fears of terrorist activity; Caroline worries about the possibility of having breast cancer.

A researcher notifies the team about a case of private contractors who returned from Iraq exhibiting a range of mysterious illnesses.

David investigates a water purification system that may have malfunctioned, leading to illness.

Bob tries to find a cure for his dog; Jill confesses to David about taking medication for panic attacks.

David and Jill make a trip to Colorado; David walks into the path of a car and is sent to the hospital in a coma.

Jill goes to Canada to see if the Spanish flu body is still in the ground; David recovers from the coma.