Comedy about two sisters, both called Catherine Walcott, who have no idea the other exists until their father dies. Cat wants to spend as much time as possible with Cathy to make up for the last 28 years and, as they were born just five days apart, decide to organise a joint birthday party. In the wake of their dad's demise, the pair struggle to find his will, while their mothers war over which family the late two-timer loved most. Stephen Tompkinson co-stars, alongside Ellie White, Lauren Socha and Rebecca Front