The fifteenth episode of Season 12, and the two hundred and eighth episode of America's Got Talent overall, aired on August 29, 2017. It was the last of three Quarterfinals performance episodes and took place in the Dolby Theatre. 12 acts performed for 7 spots in the Semifinals.
Despite being eliminated in the Judge Cuts, Final Draft returned to the competition.
Oskar and Gaspar joined the Quarterfinals despite not appearing in the Judge Cuts.
|1. DaNell Daymon & Greater Works||Gospel Choir|
|2. Junior & Emily Alabi||Salsa Dancer Duo|
|3. Final Draft||R&B Vocal Group|
|4. Oscar Hernandez||Dancer|
|5. Angelina Green||Singer|
|6. Colin Cloud||Mentalist|
|7. Mike Yung||Singer|
|8. Oskar and Gaspar||Videomapping Act|
|9. Sara and Hero||Dog Act|
|10. Chase Goehring||Singer|
|11. Diavolo||Acrobatic Dance Group|
- This is the first live show of Season 12 where an act wasn't buzzed.
- Mel B gave every act a standing ovation except for Colin Cloud on the technicality that she was used in his performance.