Seasons & episodes

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.

When a young boy is murdered, forensic evidence leads the NorBAC team to investigate the unlikely existence of a prehistoric cat that disappeared from North America 10,000 years ago; a dramatic development complicates NorBAC's plans to deactivate Nina's Jacobson's organ.

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.

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