The results show will choose four acts to move on to the finals. Also, David Hasselhoff gives a performance.

The TAPS team head to Chadds Ford, Pennsylvania to investigate a ranch that was built on a Revolutionary War battlefield. Later on the second investigation of the episode, TAPS visits the former home of Confederate General Robert E. Lee known as the Lee-Fendall House located in Alexandria, Virginia.

The remaining contestants try to serve the 300 pilots and crew from the USAF Air Demonstration Squadron based at Nellis AFB with the same Pride, Precision and Professionalism on deck that the Thunderbirds show in the air. Guest judege: Mark Peel.

The Leverage team tries to take down a diamond merchant who hires people to rob his own trucks in order to get the insurance payout. Meanwhile, the team has to cope for a missing Sophie, so Hardison takes over the grifter's part by posing as "The Ice Man".

Will Schuester was a former glee club star and is now given the task of transforming the bunch of misfits at McKinley High School into a real group of singers. His first task is to find a male singer who can match up with diva Rachel. His prayers are answered when he hears the school's football quarterback, Finn, as he sings in the shower. Meanwhile, Will's wife is begging him to find a higher paying job.

Adam competes in the Doughman race, which combines eating with a triathlon, as he visits Durham, N.C.

A turf war between two feuding gangs is the area where the covert team penetrates. One gang is a new group which plans on taking over the heroin business. In other developments, Ty's sister is in need of $7,000, which neither Ty and Melissa can afford.

Coming Soon...

One cast member has been sent to jail. Emilee incurs Bronne's wrath after destroying his prized magazines.

Oscar threatens to quit because of Freddie's pushiness, just as the Big Dog 28 crews strive to complete the second of four wells in 50 days. Elsewhere, Cheston makes a major mistake in which Gerald tries to benefit from.

TR is called to a domestic siege on the outskirts of Melbourne where they journey into dense bush to save a young boy. They soon realise however, that the boy doesn't need saving.

When Josh is shot, Lawson faces a dilemma in how to get the boy under control. Kerry receives the brief for the coronial inquest of causing a cyclist's death.

Sandra is forced to face a shocking revelation about her own past. The remains of Harry Eldridge is found 33 years after he went missing and the team are asked to reinvestigate the murder of Dr Simon Lockhart, who was found dead on a meat hook on Harry's stall on the day he went missing. The team soon discover that Eldridge had a much darker side. DNA tests on Eldridge's body end up matching to an unidentified person who is related to Sandra. Sandra is left feeling shocked about her own family's secrets.

Host Dara O'Briain is joined by regulars Frankie Boyle, Hugh Dennis, Russell Howard and Andy Parsons and special guests Holly Walsh and Stewart Francis.