Tonight's (September 23) episode saw the conclusion of the Boot Camp auditions, and six boys, girls, groups and over-28s were put through to the Judges' Houses stage of the competition.
First to hear their fate were the boys. James Arthur, Jahmene Douglas, Nathan Fagan-Gayle, Adam Burridge, Rylan Clark and Jake Quickenden impressed the judges and progressed, but rocker Joseph Whelan was left disappointed.
After hearing the verdict, Whelan - who had said it "would destroy him" if he didn't make the next round - told Dermot O'Leary: "I'm letting my son down, I've let everyone down."
Next, the final six girls were revealed as Ella Henderson, Amy Mottram, Jade Collins, Lucy Spraggan, Leanne Robinson and Jade Ellis.
Spraggan won the judges over with a performance of her own song 'Tea and Toast', and 16-year-old Henderson, who chose to sing Cher's 'Believe' at her final audition, said her "heart was pounding" on stage.
"I'm so happy. I'm so so happy," she gushed.
The top six over-28s were unveiled as Kye Sones, Melanie Masson, Nicola Marie, Brad Shackleton, Carolynne Poole and Christopher Maloney.
Sones, who was overcome by emotion and sunk to his knees after his final performance, exclaimed that he had never been picked first for anything before. He joined Maloney in his disbelief, after the Liverpudlian managed to overcome his crippling nerves.
"I didn't think they were going to call my name out," said Maloney, who was determined to "turn [his] nerves into something positive" as he stood before the judges. "All day I have been thinking it was a no."
Finally, Mitsotu, Duke, MK1, Poisonous Twins and Rough Copy were told that they had made it through in the groups category, with one place remaining.
It was left to Gary Barlow to tell GMD3 and Triple J their fate after a tense sing-off.
"Okay guys, you have been neck and neck throughout this competition, and I'm sorry it has come down to this, but we have to pick one of you right now," he told the bands. "The act taking the last place of Judges' Houses of the groups is... GMD3."
However, Triple J are reported to now also be part of the category, after Rough Copy were forced to pull out of the competition due to visa issues.
The X Factor continues next Saturday at 7.30pm on ITV1, where the acts will join their mentors for the Judges' Houses stage of the competition.
Photo gallery - The X Factor Final 24: