K-pop group NCT 127 are set to perform on America's Got Talent during the show's season 21 quarterfinals, with the episode broadcasting on NBC on Wednesday 19 August. Special performances of this kind help boost visibility for the show and its guest artists, and give viewers without traditional cable access a reason to seek out streaming options such as Sling TV.

The performance airs at 8pm ET/PT from the Pasadena Civic Auditorium in Pasadena, California, alongside hosts Terry Crews and judges Howie Mandel, Sofía Vergara, Mel B and Simon Cowell. Viewers without a cable subscription can watch via Sling Blue, which starts at $54.99 a month and carries NBC along with a range of other local and cable channels, though availability varies by market. This season's America's Got Talent grand prize winner will receive $1 million.