Cat and Cathy reel from the news that they have a secret brother - who Cathy just snogged. Marilyn is furious to learn she wasn’t Colin’s only mistress and starts stalking his other lover.

Cat feuds with a rival delivery driver and Cathy loses a fight with a washbasin at work. Tess’s singles holiday is a disaster while Angela becomes Marilyn’s house guest from hell.

Cat & Cathy go to an adult maths GCSE class where the sexy teacher causes ructions. Tess takes a job in the worst place possible, and Angela resorts to kidnap to win back Peter.

Cathy is excited to introduce her siblings to lambing season at Auntie Dawn’s farm, but Tess brings along an unwelcome visitor and Cat brings an unwise gift.

In a bid to heal his rift with Angela, Callum is lured to an eventful Northern Soul Revival. Next day, their Dad Colin still has surprises for his family from beyond the grave.