The series launched on Channel 5 in the United Kingdom and TV3 in the Republic of Ireland on 12 May 2015 and ended on 16 July 2015, a week earlier than planned.

[5] On 2 February 2015, it was revealed that Willis had stepped down as a host on the show's spin-off series Big Brother's Bit on the Side, though Rylan Clark will continue.

[8] It is the second series to feature returning housemates after Ultimate Big Brother with Nikki Grahame, Aisleyne Horgan Wallace, Brian Belo and Helen Wood taking part as long-term houseguests.

[9] The theme of the series was Timebomb, with show bosses explaining that "with Big Brother playing with the concept of time, the tasks, secret missions and twists promise to have tension, drama and intrigue.

[19] As well as these three, a number of other faces from Big Brother's past will return to the House to take part in classic tasks and twists.

[20] On 12 June 2015, hours before the fake eviction, it was confirmed that Brian Belo, Helen Wood and Nikki Grahame would be re-entering the House.

[21] These three were originally meant to leave the House on Day 39 but Big Brother decided to extend their stay for an extra week.

These guests included John McCirick, Charley Uchea, Jasmine Lennard, James Jordan and Dexter Koh.