Written by John as an expression of his love for Yoko Ono, the song is heartfelt and passionate. As John told Rolling Stone magazine in 1970, “When it gets down to it, when you’re drowning, you don’t say, ‘I would be incredibly pleased if someone would have the foresight to notice me drowning and come and help me,’ you just scream.”

The mop-topped fab four from Liverpool conquered the world with catchy, feel-good hits like this song “I Feel Fine” from 1964. In the video, you can catch the Beatles' sense of humor, with George pretending to sing the wrong words and Ringo riding a bicycle instead of playing the drums.

The production of the song "Now and Then" took place over five decades and is the product of conversations and collaborations between the four Beatles that go on to this day. The long mythologized John Lennon demo was first worked on in February 1995 by Paul, George and Ringo as part of The Beatles Anthology project but it remained unfinished, partly because of the impossible technological challenges involved in working with the vocals John had recorded on tape in the 1970s.

Wildlife caretaker and lifestyle photographer are among the jobs that were advertised in this promotional video for Australia. Each of the jobs had a nice salary and came with a jar of Vegemite, a spread made from brewer's yeast, vegetables, and spices, which is a favorite Australian food.

Leonard daydreams about saving Penny and her falling for him.

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

The boys decide to go to Long Beach in order to keep lying to Penny.

Penny tries to patch things up between Leonard and Sheldon when they are having a fight, but ends up making things worse!

When Penny dislocates her shoulder, Sheldon brings her home from the hospital and tucks her into bed.

Howard takes a moment in the tub to fantasize that Katee Sackhoff from Battlestar Galactica is in the tub with him. As it turns out, she has some advice for him.

Leonard finally tells Penny how Sheldon saved his life and broke the elevator at the same time.

When Penny returns from visiting her family in Nebraska, Leonard is happy to see her. Sheldon, however, is much less welcoming when he learns that her family has the flu.

Penny invents a quiz to find out whether Sheldon or Leonard is smarter, which only reveals that both of them are completely uninformed about popular culture with the exception of Star Trek.

In this short scene, a deeply star-struck Sheldon meets one of his heroes, the great actor James Earl Jones, whom Sheldon knows as the voice of Darth Vader in the Star Wars movies.

The Black Eyed Peas originally are from Los Angeles. The video for "Just Can't Get Enough" from their sixth studio album was shot in Japan.