Simon Cowell, Amanda Holden, David Walliams and Alesha Dixon will all take their seats at the judges' desk and watch while the hopefuls take to the stage.
What mischief will Mr Walliams cause on the night? After his Golden Buzzer pick caused outrage, will he make it any further than this round? Alesha and Amanda are bound to have some amazing frocks to showcase this week, but what will they be wearing tonight?
Ant and Dec will be there to reveal who the public have picked to go through to the grand final in a couple of week's time, and then the next two most popular will face the judges vote – but will they choose wisely?
Britain's Got Talent, ITV, 7.30pm & 9.30pm
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