The top 7 dancers perform seeking the title of "America's Favorite Dancer."

Results Time and the 12 performers are narrowed down to only 4 spots available for the Semi-Finals in Las Vegas. With the performers giving it all they have, the results are in and the performers are dwindled down. Guest singers Selena Gomez and the Scene and "Rock of Ages"

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Fresh is best tonight as the chefs gather crabs for the Quickfire, and then travel to a Virginia farm where its bounty will supply the ingredients for dinner.

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When the daughter of a Chinese Triad family disappears, Shawn and Gus take on the case.

The WoW Freakout Kid undergoes a Web Investigation, a horny horse distracts parade goers, and Daniel hypothesizes which celebrities he could beat in a fight.

Melanie's mother and Victoria's father visit on the same weekend forcing them to see their parents in a new light; Erika brings Joy and her mother together.

Aliens almost certainly do exist. So why haven't we yet met E.T.? It turns out we're only just developing instruments powerful enough to scan for them, and science sophisticated enough to know where to look. As a result, race is on to find the first intelligent aliens. But what would they look like, and how would they interact with us if we met? The answers may come to us sooner than we imagine, for one leading astronomer believes she may already have heard a hint of their first efforts to communicate.

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Summer toy demonstration; actor Joseph Gordon-Levitt; Laurie Anderson performs.

Tracy Morgan, Drew Brees, Flo Rida

Aaron, Alvin and Jimmy faced a Basic Skills Test in a two-round Elimination Challenge. The first round saw contestants identifying different types of fish, with the two lowest scoring contestants moving into the second round. Jimmy named the most fish correctly, leaving Aaron and Alvin to face off in the second round; to cook the perfect fish and chips.

Tiff is helped by David Coulthardto assess the Mercedes SLS AMG. Jonny and Vicki take part in a messy 4x4 challenge. Jason gets the chance to put one of the last great Ferraris to the test.

Dara O Briain and regulars Hugh Dennis, Russell Howard and Andy Parsons look back at another week's news with guests Patrick Kielty, Zoe Lyons and Milton Jones.