Air date: 2015-01-10

Runtime: min

The singing contest returns for a fourth series as Rita Ora joins the panel.

Air date: 2015-01-17

Runtime: min

The coaches assess the vocal talents of another ten hopefuls.

Air date: 2015-01-24

Runtime: min

To Sir Tom's delight, this edition sees many Welsh faces behind the spinning chairs.

Air date: 2015-01-31

Runtime: min

The blind auditions continue with surprises including trumpet-playing Dawn.

Air date: 2015-02-07

Runtime: min

The blind auditions continue and include a celebrity chauffeur booker and an Essex rapper.

Air date: 2015-02-14

Runtime: min

The judges hear from Beckenham duo the Rise, poet Lara Lee and Damian Dalton Smith.

Air date: 2015-02-21

Runtime: min

The blind auditions come to an end as the coaches complete their teams.

Air date: 2015-02-28

Runtime: min

Emma and Marvin present as the coaches pair up their acts to battle it out against each other in head-to-head musical performances.

Air date: 2015-03-07

Runtime: min

In a nail-biting final battle, the remaining artists of each team take to the stage.

Air date: 2015-03-14

Runtime: min

The coaches must choose the best three acts from their team to continue to the live shows.

Air date: 2015-03-15

Runtime: min

The coaches must choose the best three acts from their team to continue to the live shows.

Air date: 2015-03-21

Runtime: min

Featuring live performances from Olly Murs and 2014's winner Jermain Jackman.

Air date: 2015-03-21

Runtime: min

Emma Willis and Marvin Humes reveal the results of the public vote.

Air date: 2015-03-28

Runtime: min

The semi-final sees the coaches' remaining eight acts perform live in front of the nation.

Air date: 2015-04-04

Runtime: min

The final four artists face the public vote in a bid to be crowned the winner.