Caroline and Olly present the final stage of the six chair challenge, featuring contestants from the Overs category. Judges Simon, Rita, Nick, and Cheryl must each select six performers to go through to the judges' houses stage - but have the freedom to change their mind at any point, so even those who win a place are not safe until the very end.

The X Factor (UK) Season 12 Episodes...

• s12e01 - Auditions 1
• s12e02 - Auditions 2
• s12e03 - Auditions 3
• s12e04 - Auditions 4
• s12e05 - Auditions 5
• s12e06 - Auditions 6
• s12e07 - Auditions 7
• s12e08 - Country House Boot Camp 1
• s12e09 - Country House Boot Camp 2
• s12e10 - 6-Chair Challenge 1
• s12e11 - 6-Chair Challenge 2
• s12e12 - 6-Chair Challenge 3
• s12e13 - Judges' Houses 1
• s12e14 - Judges' Houses 2
• s12e15 - Live Show 1
• s12e16 - Live Show 1 Results
• s12e17 - Live Show 2
• s12e18 - Live Show 2 Results
• s12e19 - Live Show 3
• s12e20 - Live Show 3 Results
• s12e21 - Live Show 4
• s12e22 - Live Show 4 Results
• s12e23 - Quarter-Final
• s12e24 - Quarter-Final Results
• s12e25 - Semi-Final
• s12e26 - Semi-Final Results
• s12e27 - The Final
• s12e28 - Final Results

The X Factor (UK) Show Summary

Each X Factor judge is in charge of a different section of singers on the show. The judges do not know what section of the competition they will be in charge of until the audition process has finished. Each judge then has to pick four acts to take forward to the live section of the show. Each week the two acts with the lowest amount of public votes have to sing again in a final showdown after which the judges decide who should be eliminated. Once there are only five acts left remaining it becomes left to the public to decide who should go.