John Legend and Lindsey Stirling perform the song "All of Me" at New York City's Kennedy Center.

Released in 1968, the animated film "Yellow Submarine" was inspired by the music of the Beatles and featured them in person as well. The spirit of 1960s counterculture is well-represented in this trailer. Enjoy!

Learn about the Big Ben clock tower, which is to London what the Eiffel Tower is to Paris or the Colosseum to Rome: a symbol of the city.

In part 8, Tommy's having a hard time catching the attention of the girl he likes. Meanwhile, Robin's invited to a party. But it's all a cruel hoax!

Here's some more stunning underwater footage. This time it's hammerhead sharks and stingrays, a wahoo and some striped eels, all filmed near the Cocos Island in the Caribbean. Take a look!

In part 7, Robin has problems with her stepfather and is threatened by a teammate.

In this episode, Doc Gruber and a colleague are testing a shark repellent. If effective, it could help save the lives of divers, swimmers and surfers all over the world.

Do you know your Turner from your Warhol? If not, don't worry, London is the perfect place to explore the art world through its wealth of museums. Watch and share Marcus's London story and let him take you on a journey of discovery. This Tate Modern curator is just one of the passionate staff waiting to introduce you to the people and ideas housed within the walls of the imposing former power station. Directly opposite St Paul's Cathedral across the Millennium Bridge, Tate Modern sits on the South Bank among one of the most vibrant new parts of the city.

After spending some time getting back into shape with her new gymnast friend, Robin gains the confidence to show off her skills in front of Mrs. Stoller. Will that be enough to get her a spot on the team?

The team's divers conclude their filming and come back to the surface unharmed. We learn more about current developments in the prevention of shark attacks.

Robin feels even more discouraged after reluctantly showing a bit of her gymnastics skill at school. But then her mom offers encouragement with a reminder of something significant from her past.

Nathalie and Jim get up close and personal with tiger and lemon sharks, trying to get the best footage while taking care not to disturb or excite the dangerous animals.

Part Two of an exclusive journey through Middle-earth with the cast and crew of The Hobbit: An Unexpected Journey. Enjoy!

Robin temporarily loses herself in gymnastics as things get worse at home. But might things be looking up for her at school?

At times, Doc Gruber's research requires the team to dive right into shark-infested waters! Their line of work certainly isn't for the faint of heart! Enjoy.