The Other One is a comedy about a girl called Catherine Walcott. And another girl called Catherine Walcott. Sisters who had no idea the other existed until their father drops dead.

Cathy has a fiancé, a Duke of Edinburgh Award and a pension. Cat has a pay-as-you-go phone. The only things they have in common are their names (a smart move if you've got a secret daughter). Both of them have always wanted a sister - just maybe, not each other.

The Other One is a comedy about what happens when you discover your dead dad has a secret family and you now have a brand new sister. This is a love story to siblings, mothers and crap dads. Throughout the series the four leading women try to make sense of their newly found sisters and sort-of-step-mums.