Immune System, Part 1 - Innate Defenses

Each week on Naked and Afraid, a new pair of complete and total strangers - one man and one woman - will find themselves stranded in and, quite literally, exposed to one of the world's most extreme weather environments. This duo will be left high and dry with no food, no water... and no clothes. They must survive on their own for a full 21 days, with nothing but one personal item each and the knowledge that the only prize is their pride and sense of accomplishment.

The Real Housewives of Beverly Hills offers a glimpse inside the world of luxurious wealth and pampered privilege, where being seen and who you know is everything. These women are in the center of it all and they have the mansions, the cars, and the diamonds to prove it. From heiresses to entrepreneurs to a family of child actresses - they deliver the star power and the drama.

They're fighting to save patients while their personal lives are brimming with drama and intrigue. Everything's at stake on the emergency ward.

Emmy Award and Grammy Award winner Jimmy Fallon brought NBC's "The Tonight Show" back to its New York origins when he launched The Tonight Show Starring Jimmy Fallon from Rockefeller Center. Fallon puts his own stamp on the storied NBC late-night franchise with his unique comedic wit, on-point pop culture awareness, welcoming style and impeccable taste in music with the award-winning house band, The Roots.

Sandi Toksvig, Alan Davies and a host of comedy stars swap funny facts on every subject under the sun. It doesn't matter if they're right, as long as they're quite interesting.