Sigrid introduces her series on English pronunciation and tells us why there isn't always just one "right" way to pronounce words.

Hunger Games star Jennifer Lawrence discusses the end of the franchise, her hilarious relationship with Josh Hutcherson, and much more.

Rachel takes us through different ways of pronouncing the "you" in the phrase "Nice to meet you," and introduces us to a new friend of hers.

Now that Julia fixed the problem with the client caused by her coworker’s mistake, she has the tough job of explaining to her boss what happened. Julia is smart enough to walk the fine line between understanding her coworker’s responsibilities and also showing some empathy for her situation. Watch this video to see just how well such tricky situations can be successfully dealt with!

Red meets David's friends Debs and Darrell, and their children Charlie and Holly. While playing hide and seek with Charlie and Holly, Red finds the perfect hiding place.

Back at home, Julia is wondering if her job interview will ultimately prove to have been a success. Impatiently she is waiting for an answer when suddenly the phone starts to ring...

Leonard daydreams about saving Penny and her falling for him.

Red simply doesn't want to wake up for school! David struggles to get him out the door, but there is something important that he is forgetting...

Jessica is planning a trip to the Grand Canyon and is trying to find reasonably priced accommodation.

While Sheldon struggles with his take-out order, Leonard bids on what he thinks is a miniature time machine.

Jessica is planning a week-long vacation and wants to rent a cabin. Let’s see if the travel agent has an offer that meets her needs.

UNICEF Goodwill Ambassador Katy Perry delivers a special weather report on the devastating effects of climate change for the world’s children.

Lauren, with the help of Matthew as a model, goes through both the singular and plural forms of body parts, along with how to use them in sentences.

peta2: At only 16 years old, Tia Blanco is already one of the top women surfers in the world. Learn how her vegan diet has helped Tia surf her way to the top!

It was only a matter of time: Homer finds himself face to face with Donald Trump's lustrous blonde hair, leading to much introspection about his own baldness.