Starting on BBC1 on 23 September.
New series which was inspired by a Mumsnet thread.
The official synopsis for Am I Being Unreasonable? calls it a "twisted comedy thriller about obsessive friendship, maternal paranoia – and a dead cat."
The synopsis continues: "Nic is grieving a loss that she can’t share with anyone and is unfulfilled in her marriage. Only her son Ollie, who she adores, keeps her going. But when Jen arrives in town her life is lit up with laughter and through this kindred soul her dark secret starts to bubble up.
"Shot through with whip smart humour, this mischievous and characterful blend of funny and frantic takes female storytelling to a refreshing and dynamic new level."