Wszystkie odcinki

Bob is back. His brain surgery caused an infection which leaves him in a bad shape when found. He is put into a medically-induced coma. The team travels to Mexico where an antibiotic-resistant strain of TB is killing the Zapatista Revolutionaries.

Carlos has disappeared for two days and David goes back to Mexico first to find Carlos and second help the Mexicans to fight the drug resistant TB that is killing tens of Mexicans in the region. Mayko and Rachel work non stop to find a cure to the TB and to find what is causing the inhabitants of Hudson Point, Illinois to be insensitive to pain.

Bob cierpi na stresujące przebłyski pamięci. Próbuje złożyć z nich pełen obraz wydarzeń, do jakich doszło w laboratorium Rotha.

Boba prześladują wspomnienia z pobytu w tajnym laboratorium Rotha. Wes jest przekonany, że to Rachel wstrzyknęła mu eksperymentalny lek.

After an experimental treatment for Hep C nearly kills him, Wes quits NorBAC to enroll in a cutting edge HCV program in Stockholm; a racist city councilor claims his daughter was poisoned by Muslim extremists; the FDA is willing to fast-track some drugs in order to save an immune-deficient woman who was infected with smallpox.

Podczas wyścigu kolarskiego w Quebecu w Kanadzie wybucha epidemia i większość uczestników trafia do szpitala. NorBAC bada sprawę.

A pharmaceutical company comes under fire when its newly-marketed immune suppressing drug triggers a high incidence of congestive heart failure; David attempts to find a replacement for Wes; Bob suffers a seizure that triggers romantic memories of a girl named Nina.

Bob finally tracks down Nina, but on a visit back to Roth's lab he makes a gruesome discovery that suggests the experiment on Nina is about to go terribly wrong; the team investigates unusual crow attacks that appear to be targeting military airports.

Członkowie komórki terrorystycznej przenikają do laboratorium NorBAC. Zmuszają pracowników do wyprodukowania złośliwej mutacji odry.

David ignores protocol and hires his new lover, Enuka; Mayko is contacted by the parents of a sick child who believe she's the only one that can help.

Jamila, siostra Enuki, zostaje oskarżona o morderstwo syna. Twierdzi ona, że legendarny 'rzeczny kot' uśpił jej synka i wyssał z niego krew.

David discovers that Roth has given the world's most powerful leaders the stem cell treatment that he now knows leads to violent paranoia; while investigating a mysterious outbreak in Moldova, Carlos uncovers a horrific act of atrocity.

Krótka wyprawa w przyszłość ujawnia, że dziecko Niny to klon Boba. Robert żyje w przekonaniu, że spełnia marzenie swoich rodziców.