Series 4 aired between 10 Jan 2015 and 04 Apr 2015, 15 episodes.
Episodes
E01
Blind Auditions 1
10 Jan 2015
E02
Blind Auditions 2
17 Jan 2015
E03
Blind Auditions 3
24 Jan 2015
E04
Blind Auditions 4
31 Jan 2015
E05
Blind Auditions 5
07 Feb 2015
E06
Blind Auditions 6
14 Feb 2015
E07
Blind Auditions 7
21 Feb 2015
E08
Battles 1
28 Feb 2015
E09
Battles 2
07 Mar 2015
E10
Knockout 1
14 Mar 2015
E11
Knockout 2
15 Mar 2015
E12
Live Quarter Final
21 Mar 2015
E13
Live Quarter Final Results
21 Mar 2015
E14
Live Semi-Final
28 Mar 2015
E15
Live Final
04 Apr 2015