S10, E1: In the tenth season premiere, Penny’s family arrives for the wedding ceremony, including her anxiety-ridden mother, Susan (guest star KATEY SAGAL), her drug-dealing brother, Randall (guest star JACK McBRAYER) and her father Wyatt (returning guest star KEITH CARRADINE). After Sheldon’s mother, Mary (recurring guest star LAURIE METCALF) and Leonard’s father, Alfred (returning guest star JUDD HIRSCH) share an evening together, however, everyone deals with an awkward morning the next day. Recurring guest star CHRISTINE BARANSKI returns as Leonard’s mother, Dr. Beverly Hofstadter, while Breaking Bad’s DEAN NORRIS guest stars as Air Force Representative Colonel Williams.