Episode 21

With the talent search open to acts of all ages, America's Got Talent has brought the variety format back to the forefront of American culture by showcasing performers from across the country. The series is a true celebration of the American spirit, featuring a colorful array of singers, dancers, comedians, contortionists, impressionists, jugglers, magicians, ventriloquists and hopeful stars, all vying for their chance to win America's hearts and the $1 million prize.

Surviving Earth will take an incredible journey into prehistory to learn the lessons from past mass extinctions.

Adopting cutting-edge digital technology, each episode transports the viewer back to meet the bizarre and amazing creatures and breathtaking landscapes of a vibrant lost world. Audiences will witness how life finds a way to survive on a planet where meteors fall, super volcanoes erupt, seas boil and the land moves. From the creators of "Walking with Dinosaurs" and "Primeval," these are the stories of the survivors, fighters and lucky ones that shaped the world we live in.

Led by Emmy Award-winning journalist Paula Zahn, On the Case features in-depth interviews and original reporting that go beyond the headlines in search of fascinating mysteries from within our nation's justice system. Each episode is highlighted by Zahn's riveting exclusive interviews, which draw out different viewpoints from the people personally connected to tragedies that rocked their local community and the investigations that attempted to piece together the truth On the Case with Paula Zahn.

Tom Gleeson stars as the Taskmaster, with Tom Cashman his devoted assistant. Each week the two Toms set five comedians a range of ridiculous tasks designed to bamboozle brains and put funny bones to the test.

Who'll master the tasks? The cleverest clogs will score the most points from the Taskmaster, while bemusement and bafflement will be rewarded with the fewest points. At series' end, the comedian with the most points will be crowned Taskmaster champion.

Inspired by the extraordinary life and work of world-famous author and physician Oliver Sacks, Brilliant Minds follows a revolutionary, larger-than-life neurologist and his team of interns as they explore the last great frontier - the human mind - while grappling with their own relationships and mental health.