NOVA scienceNOW - Season 4

Tracker features lone-wolf survivalist Colter Shaw, who roams the country as a "reward seeker," using his expert tracking skills to help private citizens and law enforcement to solve all manner of mysteries while contending with his own fractured family.

Temptation Island follows four dating couples at a pivotal time in their relationship, where they must mutually decide if they are ready to commit to one another for the rest of their lives -- or should go their separate ways. Together, the couples travel to the tropical paradise of Maui, Hawaii, where they join 24 eligible men and women. There, they live the "single life," in a test that is meant to help answer their most difficult questions about their relationship.

NCIS (Naval Criminal Investigative Service) is more than just an action drama. With liberal doses of humor, it's a show that focuses on the sometimes complex and always amusing dynamics of a team forced to work together in high-stress situations. Leroy Jethro Gibbs, a former Marine gunnery sergeant, whose skills as an investigator are unmatched, leads this troupe of colorful personalities. Rounding out the team are Anthony DiNozzo, an ex-homicide detective whose instincts in the field are unparalleled and whose quick wit and humorous take on life make him a team favorite; the youthful and energetic forensic specialist Abby Sciuto, a talented scientist whose sharp mind matches her Goth style and eclectic tastes; Caitlin Todd, an ex-Secret Service Agent; and Timothy McGee, an MIT graduate whose brilliance with computers far overshadows his insecurities in the field; Assisting the team is medical examiner Dr. Donald "Ducky" Mallard, who knows it all because he's seen it all, and he's not afraid to let you know. From murder and espionage to terrorism and stolen submarines, these special agents travel the globe to investigate all crimes with Navy or Marine Corps ties.

Set inside the bubble of Silicon Valley, The Audacity takes on the warped dreams, outsized egos, and ethical lapses of the self-styled inventors of the future. In a world of jaded billionaires, psychiatrist-gurus, bio-hacked tech bros, AI labs and disillusioned teens being optimized in elite private schools, an audacious data-mining CEO strives to turn insight and influence into profit and power. The darkly comedic drama confronts reality, privacy, and the delusions fueling our ever-changing world.

In Fire Country, seeking redemption and a shortened prison sentence, young convict Bode Donovan joins a firefighting program that returns him to his small Northern California hometown, where he and other inmates work alongside elite firefighters to extinguish massive blazes across the region.