Ed sings some tunes with James Corden in the car, and talks about a bender with Justin Bieber in Tokyo. It started at a dive bar and ended up on a golf course.

Ed Sheeran talks about preferring to have his guitar and not just a microphone when he's singing. They sing “Castle on the Hill” and James comes up with a little variation inspired by Los Angles traffic.

James and "Men in Black: International" star Chris Hemsworth head to The Northall in London for a battery of tests to see who is the better restaurant employee. From greeting guests to serving food, Chris and James create a dining experience no patron that day will ever forget.

The vying waiters continue to clash in their quest to be declared the better restaurant worker at The Northall in London. Who will Chef André choose?

It's time for another round of "Know For Your Row," a trivia quiz for the audience in which individual rows compete against each other for a cash prize. Get a question wrong and you're losing for everyone in your row!

In James Corden's game, everyone in a row has to get their answers right in order to win. With questions ranging from pop culture to art history, will it be possible?

As we near the end of the row and the end of the game, the tension is beginning to show! In the end someone must step up and answer the final question, which comes with a surprising moral dilemma: would you rather have everything for yourself or something for everyone?

The roads are busy today as Jennifer Lopez rides along with James and they blast out some of her greatest tunes together. James wants to know if there’s any truth in the rumour that Jennifer once insured her butt for a million dollars, and he can’t resist having a bit of fun with some other drivers stuck in the traffic.

James Corden and Jennifer Lopez talk about marriage, romance, and the beauty of the Spanish language.

James Corden and Jennifer Lopez carpool to CBS singing some of her most popular tracks before James takes Jennifer's phone and sends a text to Leonardo DiCaprio.

Why do some of the national parks in the United States resemble the European Alps? Geologist Dr. Robert Darga answers this question.

Why are some rock formations and animals found on more than one continent? The explanation dates back to the Ice Age.

In Yellowstone Park, visitors can see many indigenous animals in their natural habitat and wonder at the park's natural hot springs.

Geysers represent a very popular tourist attraction in Yellowstone Park. How do they work and where do they come from? And what is sandstone? The video answers these questions.

In this segment, we learn about the role weather plays in the creation of rock formations in the national parks of the United States.