On the eve of Cathy's wedding, the bride-to-be cannot enjoy her pre-nup drink-up as she's obsessed by a scuff on the wall Marcus made when throwing her the car keys. Cat reluctantly agrees to drive Cathy to a DIY store to pick up some paint so they can cover the scuff but, at the store, they run in to Melanie, Cat's old school bully. Cathy decides to stand up for Cat and get the revenge Cat always wanted. Ellie White, Lauren Socha, Rebecca Front and Caroline Quentin star

S1Ep6