Aired: 8/18/2007
The show returns for it's fourth series with Dermot O'Leary as the new host. Hopefuls audition for the judges hoping to impress and make it through to the next stage of the competition. Simon decides that new judge Brian isn't working out on the show and decides to ask Louis Walsh to return as his replacement.
Aired: 8/25/2007
The auditions come from Birmingham and Cardiff as more hopefully try and impress the judges. Paris who at 14 last year impressed all the judges but was too young for the competition returns once again. With the competiton now open to 14 year olds and above she manages to impress again and makes it through. Others to impress include Ryan who has been serving in the British Army in Iraq.
Aired: 9/1/2007
More hopefuls good and bad try and impress the four judges in a hope of making it through to the next round of the competition. Dermot is on hand to talk to those who make it through and also to offer comfort to the less successful.
Aired: 9/8/2007
More hopefuls good and bad try and impress the judges and again a place in the next round of the competition. Kelly's father is upset with Simon when he refuses to put his daughter through to the next round. Natasha Benjamin manages to impress all the judges after they hear her history and they her her sing.
Aired: 9/15/2007
Aired: 9/22/2007
Aired: 9/29/2007
Aired: 10/6/2007
Aired: 10/7/2007
Aired: 10/20/2007
Aired: 10/27/2007
Aired: 11/3/2007
Aired: 11/10/2007
Aired: 11/17/2007
Aired: 11/24/2007
Aired: 12/1/2007
Aired: 12/8/2007
Aired: 12/15/2007