The Season 10 premiere of The Big Bang Theory starts out with a bang. While everyone deals with the aftermath of Sheldon’s mother Mary (Laurie Metcalf) having spent the night with Leonard’s father Alfred (Judd Hirsch), they also get ready for Penny and Leonard’s wedding. More drama ensues when Penny’s family arrives — including her father Wyatt, her drug dealer brother Randall (Jack McBrayer), and her neurotic mother Susan.
Susan is portrayed by singer/actress Katey Sagal. She’s best known for her roles on The Bastard Executioner (Annora of the Alders), Sons of Anarchy (Gemma Teller Morrow), Lost (Helen Norwood), Boston Legal (Barbara Little), 8 Simple Rules (Kaley Cuoco’s mother Cate Hennessy), and Married with Children (Peggy Bundy), among others. The Big Bang Theory airs Mondays at 8pm on CBS.