There were never two more unlikely sisters than working class heroines Sharon and Tracey. Along with their friend and lodger, maneater Dorien Green, they're back for another series of laugh-out-loud and bittersweet adventures. Kicking of with a promised Christmas trip to Tenerife, courtesy of Dorien's continued income as Sixty Shades of Green author Foxy Cohen, the Birds hare their many successes and failures, including Sharon's interview to become a spy, Tracey's trip to jail and a traditional cockney knees-up with London's Pearly Kings and Queens. But there are life-changing surprises too - as Dorien comes face-to-face with someone she thought she'd never see again, and a heart-stopping scare for both Chigwell sisters in a poignant and hilarious two-part finale.