THE OTHER ONE

BBC1, 9.30pm

The first series of this sitcom introduced viewers to half-sisters Catherine ‘Cathy’ Walcott (Ellie White) and Catherine ‘Cat’ Walcott (Lauren Socha), neither of whom was aware of the other’s existence until their father suddenly dropped dead. Over the course of the first run they came to terms with the revelation, only to be hit by another bombshell – they also have a brother, Callum (Christopher Jeffers), and to make things even more complicated, Cathy kissed him. She is understandably struggling with her feelings about her latest long-lost sibling, but Cat is determined to welcome him to the family – even if he isn’t sure what that word even means anymore. Meanwhile, Cat’s mum, Marilyn (Siobhan Finneran) is unhappy to realise she wasn’t Colin’s only mistress.