Uncover the history of the Concorde, the passenger plane that flew at twice the speed of sound. Wednesday, October 24 at 9 pm ET. Repeats 10/25 at Noon ET.

See how state governments and Wall Street led America’s public pensions into a $4 trillion hole. Tuesday, October 23 at 10 pm ET. Repeats 10/25 at 2 pm ET.

Explore the mysterious and misunderstood lives of big cats across the world. 3-part mini-series. Wednesdays at 8 pm ET, Oct. 24, 31 & Nov. 7. Repeats Wed. at Noon ET.

After millions of votes, find out which of the 100 nominated books is crowned America's best-loved novel. Final episode Tuesday, October 23 at 8 pm ET. Repeats 10/24 at 1 pm ET.

Discover the cities, science, art and beliefs that connected Native Americans 15,000 years ago. 4-part series. Tuesdays, Oct. 23, 30 & Nov. 13 at 9 pm ET. Repeats Thur. at 1 pm ET.

The series returns for a complete encore of all six seasons. Season 5 airs Sundays at 7 pm ET during October.