It's a race against time to identify the cause of a deadly virus, spreading rapidly and headed strai...

Lilith befriends Mick, who is dying and desperate for David to help him discover if he really is a c...

Mick turns to Lilith, who helps him steal evidence from the scientist who cloned him, his own father...

NorBAC investigates an outbreak of prion disease (mad cow) in humans. The victims are spread out acr...

As the search continues for the source of the deadly prions, NorBAC zeros in on a large agribusiness...

NorBAC reviews an experimental treatment being used on children with Leukemia. Just as they are abou...

Carlos Serrano, the Senior Researcher at NorBAC wants to help a friend dying of AIDS participate in...

A major power blackout on the Eastern Seaboard leads to fears of terrorist activity. NorBAC determin...

Mayko Tran, NorBAC's bioinformatics researcher, notifies the team at NorBAC about a case of privatel...

In the continued investigation of the "Iraq War Syndrome," David checks out a theory that the water...

NorBAC has been taken over by a joint command to deal with a catastrophic smallpox scenario. Bob tri...

David and Jill make a trip to Colorado where a rampant SARS-like outbreak is occurring. David is in...

Jill goes to Canada to see if the Spanish Flu body is still in the ground. David recovers from his c...

After a self-imposed exile to China, David Sandström is kidnapped by the People's Liberation Army an...

In order to help a mother and her unborn child, David starts a research to fight a very strong strai...

The HIV strain that sean gave to Audrey Graves is so virulent that none of the new tri-therapy drugs...

While in New York, David has his bag stolen. Chasing the kid who stole it, he finds himself in some...

Jill's new treatment for juvenile diabetes is halted when she discovers than the stem cells hold a r...

Carlos and David helped by a Cuban scientist called Eva Ramone look into a claim than an exiled Cuba...

David and Carlos are still investigating the poison that is affecting Charringa's lemon crops in Flo...

Bob is trying to prevent a rain of concentrated sulfuric acid that would destroy Mexico City. Homela...

There is a series of suicides in Arkansas that Norbac is called to investigate. David tries to decip...

As the investigation continues on the suicides in Arkansas, the team believes it is a chemical relea...

Despite David's public statement that GMO fish has no bearing on some illnesses, the dad of a young...

It seems that the retrovirus that Jill discovered in the Korean stem cells is responsible for the il...

The antidote created to cure the national guards isn't doing its job properly as the guards fall eve...

What happened to Bob, Mayko, David, Jill and Caroline? 6 months after the explosion, NorBac is still...

NorBac must find a cure to a bacterium that will surely kill David and Bob if they do not succeed. T...

The US government wants to cut over $3 billion out of the science budget, and NORBAC has to prove th...

Mayko finds the missing link to the Sinatra syndrome; Owen tries to commit suicide.

The team traces the Sinatra virus to an organ donor in the Philippines; David blames himself for all...

Mayko tries to get rid of the pain she's feeling in her phantom limb; the team investigates the high...

NorBac searches for the source of a resistant strain of c. difficile; despite his limited vision, Bo...

Several fires in British Columbia start. One of the action organizers calls NorBac in as several fir...

A weaponized biological agent was released during fires on the west coast, NorBac must find the crea...

David discovers that NorBac has been tapped by Riddlemeyer. The team must find what caused the bear...

Bob undergoes his eye surgery in the hope he won't go totally blind in the process. Carlos and David...

Fears arise that Carlos may have been infected with Crimean Congo Hemorrhagic Fever; after experimen...

NorBAC discovers a link between the tantalum contamination and the recent smallpox scam; a viral act...

Bob is back. His brain surgery caused an infection which leaves him in a bad shape when found. He is...

Carlos has disappeared for two days and David goes back to Mexico first to find Carlos and second he...

As if being HIV positive wasn't enough, Wes is infected accidentally with a needle full of Hepatitis...

Bob continues to be haunted by memories of his time at Roth's secret lab; Wes insists that Rachel in...

After an experimental treatment for Hep C nearly kills him, Wes quits NorBAC to enroll in a cutting...

NorBAC investigates a mysterious outbreak that is hospitalizing cyclists on the course of the Tour C...

A pharmaceutical company comes under fire when its newly-marketed immune suppressing drug triggers a...

Bob finally tracks down Nina, but on a visit back to Roth's lab he makes a gruesome discovery that s...

A terrorist cell infiltrates the NorBAC lab and forces the scientists to produce a deadly measles mu...

David ignores protocol and hires his new lover, Enuka; Mayko is contacted by the parents of a sick c...

When a young boy is murdered, forensic evidence leads the NorBAC team to investigate the unlikely ex...

David discovers that Roth has given the world's most powerful leaders the stem cell treatment that h...

Season 4 finale. A glimpse into the future renews David's determination to stop the birth of the fir...