Oprah's dreams come true on stage with Tina Turner. Plus, the Sarah Palin interview.

Oprah and Debra recall "The Top Five Moments of All Time" from "The Oprah Winfrey Show," including love-struck Tom Cruise, Oprah's weight loss story and the great Car Giveaway. TV Guide Magazine's number one pick for the top moment is revealed!

Explores sleep deprivation and sleep disorders. Including reports on a Billings, MT college student convicted of involuntary manslaughter; and a woman killed when a man who admitted he had not slept for 30 hours fell asleep at the wheel.

Intelligence, adaptability and resourcefulness have enabled primates to thrive in an incredible diversity of habitats. Primates have found extraordinary ways to improvise, especially when faced with challenges beyond their physical means.

Jack is at his wit's end with his wife, Michelle, who refuses to initiate sex or make noise during intercourse - leaving Jack wondering if she's even awake.

Jaime's weight gain, kinky sexual demands, and desire for a baby have upset the balance of power in her marriage to Leonard, causing a major rift in the bedroom.