Her name might be Sunny Barnes, but she's got a dark side.

That's what Reba McEntire promises of her new character on season 3 of ABC thriller Big Sky. The country superstar has joined as a series regular, and her character, the matriarch of a family of outdoors outfitters, could spell bad news for the investigative team of Dewell and Hoyt. And it's Reba unlike we've ever seen her before.