The pressure mounts as Simon, Ellen, Kara and Randy narrow down the contestants even further in their search for the Top 24. See who makes it through to another day when the all-new two-hour Hollywood Round 3 begins.

The John Locke impostor takes Sawyer on a trek through the jungle towards answers, while in the alternate reality John Locke struggles with life on a wheelchair.

Mike takes a second look back at jobs in tight workspaces.

Murdoch finds himself with no memory and ends up in Bristol England searching for answers.

The Forgotten Network sets out to ID a 40-year-old woman found murdered in a local bar. One of the primary suspects is a superstar basketball player (guest star Baron Davis, LA Clippers), who had an altercation with Jane Doe days before. As the team follows several leads, they learn that Jane Doe had paid to adopt a baby right before she died. But if that's what led to her death, what happened to all the money? Where is the baby? And who was willing to kill her for it.

Alex and Thad take on the responsibility of enticing a star high school quarterback into joining Blue Mountain State. Meanwhile, Sammy tries to create a great masturbation story.

Michael could see Connie looked better than ever; immaculate, confident, and on top of the world. However, he discovered that Connie was no longer queen bee in her new job, and saw an opportunity to tempt her back to Holby. He wasn't successful and neither was Elliot. Refusing to return Connie couldn't help but feel guilty about the people she'd left behind.

Could you have come up with Einstein's theory of relativity? If not - why not? This is what Marcus du Sautoy, professor of mathematics, wants to explore. Marcus readily admits that he is no genius, but wants to know if geniuses are just an extreme version of himself - or whether their brains are fundamentally different. Marcus meets some remarkable individuals - Tommy, an obsessive artist who uses his whole house as his canvas; Derek: blind, autistic, and a pianist with apparently prodigious gifts; Claire who is also blind, but whose brain has learned to see using sound. Marcus is shown how babies have remarkable abilities which most of us lose as teenagers. He meets a neuroscientist who claims he has evidence of innate ability, a scientist who's identified a gene for learning, and Dr. Paulus, who has discovered how to sharpen the brain... by electrically turbo-charging it.