Three's a crowd?

There are shocks aplenty as Cathy and Cat meet their long-lost brother...

- IAN MACEWAN, VICTORIA WILSON

Secret brother...Callum

THE OTHER ONE

Fri, 9.30pm (NI, 12.35am), BBC1 Comedy (box set, BBC iPlayer)

Having finally come to terms with the fact that they're sisters, chalk-and-cheese siblings Catherine 'Cathy' Walcott and Catherine 'Cat' Walcott must now get used to the idea they have a brother as The Other One returns for a second series.

Sisters... (From left) Cathy and Cat