Choirmaster Gareth Malone challenges the four remaining workplace choirs to find their souls, rhythm and conviction in a joyful bid to be crowned the year's best workplace choir. Three world class choral judges, an 800-strong audience and the London Community Gospel Choir await them at a celebration concert in one of the country's biggest gospel churches. Spirits are lifted at the fire service amidst news of strike action, the besuited bankers descend into dad dancing, the council workers try to rediscover belief in themselves and the ferry staff exuberantly rock the boat during rehearsals. On the night, potential soloists wait nervously for Gareth to decide who has the courage and fervour to step forward and improvise and lead their choir into the grand final.