If her name isn't familiar to you, her character sure is. Karin Konoval played Ma Peacock in Season 4's "Home" and left many Philes checking under the bed in terror. Entertainment Weekly has confirmed Ms. Konoval will return for several roles in one episode in Season 11. She won't be revisiting Ma Peacock, but as creator Chris Carter says "she will be returning in a tour-de-force performance in an early episode. Or, more accurately, performances."
Read more from EW here.