Title: The Big Bang Theory
Content:  In scenes set at Howard's home, he interacts with his rarely-seen mother (voiced by Carol Ann Susi until her death) by shouting from room to room in the house. She similarly interacts with other characters in this manner. She reflects the Jewish mother stereotype in some ways, such as being overly controlling of Howard's adult life and sometimes trying to make him feel guilty about causing her trouble. She is dependent on Howard, as she requires him to help her with her wig and makeup in the morning. Howard, in turn, is attached to his mother to the point where she still cuts his meat for him, takes him to the dentist, does his laundry and "grounds" him when he returns home after briefly moving out. Until Howard's marriage to Bernadette in the fifth-season finale, Howard's former living situation led Leonard's psychiatrist mother to speculate that he may suffer from some type of pathology, and Sheldon to refer to their relationship as Oedipal. In season 8, Howard's mother dies in her sleep while in Florida, which devastates Howard and Stuart, who briefly lived with Mrs. Wolowitz.
Title: The Big Bang Theory (season 8)
Content: Carol Ann Susi as Mrs. Wolowitz ; Regina King as Janine Davis ; Michael Massimino as himself ; Laura Spencer as Emily Sweeney ; John Ross Bowie as Dr. Barry Kripke ; Brian George as Dr. V.M. Koothrappali ; Alice Amter as Mrs. Koothrappali ; Wil Wheaton as himself ; Laurie Metcalf as Mary Cooper ; Christine Baranski as Dr. Beverly Hofstadter ; Stephen Hawking as himself 
Title: Christine Baranski
Content:  In 2009, Baranski began guest-starring in The Big Bang Theory as Dr. Beverly Hofstadter, a dispassionate psychiatrist and neuroscientist and mother of one of the protagonists, Leonard Hofstadter. She first appeared in the second-season episode "The Maternal Capacitance", for which she received an Emmy nomination. Due to the popularity of her first appearance, Baranski returned in the third season for the Christmas episode "The Maternal Congruence", receiving another Emmy nomination. She appeared in a total of 16 episodes during the show's run, earning four Emmy nominations for her recurring role. From 2009 to 2016, Baranski played the role of Diane Lockhart, a top litigator and senior partner 
Title: The Big Bang Theory (season 3)
Content: Laurie Metcalf as Mary Cooper ; Carol Ann Susi as Mrs. Wolowitz ; John Ross Bowie as Dr. Barry Kripke ; Wil Wheaton as himself ; Kevin Sussman as Stuart Bloom ; Melissa Rauch as Bernadette Rostenkowski ; Brian George as Dr. V.M. Koothrappali ; Alice Amter as Mrs. Koothrappali ; Christine Baranski as Dr. Beverly Hofstadter ; Sara Gilbert as Leslie Winkle ; Brian Thomas Smith as Zack Johnson 
Title: The Big Bang Theory (season 10)
Content: Judd Hirsch as Alfred Hofstadter ; Keith Carradine as Wyatt ; Katey Sagal as Susan ; Jack McBrayer as Randall ; Josh Zuckerman as Marty ; Laura Spencer as Emily Sweeney ; Brandon Jones as The Flash ; Maria Canals-Barrera as Issabella Maria Concepcion ; Christopher Lloyd as Theodore ; Kate Micucci as Lucy ; Alessandra Torresani as Claire ; Katie Leclerc as Emily ; April Bowlby as Rebecca ; Riki Lindhome as Ramona Nowitzki 
Title: The Big Bang Theory (season 1)
Content: Brian Patrick Wade as Kurt ; Vernee Watson as Althea ; Sara Gilbert as Leslie Winkle ; Laurie Metcalf as Mary Cooper ; Mark Harelik as Dr. Eric Gablehauser ; Carol Ann Susi as Mrs. Wolowitz ; Brian George as Dr. V.M. Koothrappali ; Alice Amter as Mrs. Koothrappali 
Title: The Big Bang Theory (season 9)
Content: Laurie Metcalf as Mary Cooper ; John Ross Bowie as Dr. Barry Kripke ; Wil Wheaton as himself ; Casey Sander as Mike Rostenkowski ; Alessandra Torresani as Claire ; Christine Baranski as Dr. Beverly Hofstadter ; Brian Thomas Smith as Zach Johnson ; Sara Gilbert as Leslie Winkle ; Bob Newhart as Dr. Arthur Jeffries/Professor Proton ; Stephen Hawking as himself 
Title: The Big Bang Theory (season 10)
Content: Christine Baranski as Dr. Beverly Hofstadter ; Laurie Metcalf as Mary Cooper ; Dean Norris as Colonel Richard Williams ; Brian George as Dr. V.M. Koothrappali ; Brian Posehn as Dr. "Bert" Bertram Kibbler ; John Ross Bowie as Dr. Barry Kripke ; Pamela Adlon as Halley Wolowitz (voice only) ; Brian Thomas Smith as Zack Johnson 
Title: The Big Bang Theory (season 2)
Content: Carol Ann Susi as Mrs. Wolowitz ; Mark Harelik as Dr. Eric Gablehauser ; Brian George as Dr. V.M. Koothrappali ; Alice Amter as Mrs. Koothrappali ; John Ross Bowie as Dr. Barry Kripke ; Sara Rue as Dr. Stephanie Barnett ; Christine Baranski as Dr. Beverly Hofstadter ; Kevin Sussman as Stuart Bloom ; Brian Patrick Wade as Kurt 
Title: The Big Bang Theory (season 9)
Content: Jim Meskimen as a Minister ; Melissa Tang as Mandy Chao ; Keith Carradine as Wyatt (Penny's dad) ; Megan Heyn as Natalie ; Patrika Darbo as Grace ; Michael Rapaport as Kenny ; Adam Nimoy as himself ; Stephen Merchant as Dave Gibbs ; Analeigh Tipton as Vanessa Bennett ; Elon Musk as himself ; Wayne Wilderson as Travis ; Jane Kaczmarek as Dr. Gallo ; June Squibb as Meemaw ; Creagen Dow as Maitre D' ; Adam West as himself ; Blake Anderson as Trevor ; Judd Hirsch as Alfred Hofstadter ; Stan Lee as himself 

Question: who plays the mother of howard on big bang theory?
Answer: Carol Ann Susi.