Sing: Ultimate A Cappella Main cast, played by Cat Deeley Episode 1x01: Episode 1 (Oct 6, 2017) Episode 1x02: Episode 2 (Oct 13, 2017) Episode 1x03: Episode 3 (Oct 20, 2017) Episode 1x04: Episode 4 (Oct 27, 2017) Episode 1x05: Episode 5 (Nov 3, 2017) Episode 1x06: Episode 6 (Nov 3, 2017) Episode 1x07: Finals (Nov 10, 2017)