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: 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 
Title: Melissa Rauch
Content:  Some of Rauch's early work was as a regular contributor to VH1's Best Week Ever television show. In 2009, Rauch began playing the recurring role of Bernadette Rostenkowski-Wolowitz, a co-worker of Penny's at The Cheesecake Factory who began to date Howard Wolowitz, in the third season of TV's The Big Bang Theory. The following season her character became Howard's fiancée and Rauch was promoted to a series regular. The characters married in the season five finale. In December 2011, Rauch and fellow cast members of The Big Bang Theory received the first of four nominations for the Screen Actors Guild Award for Outstanding Performance by an Ensemble in a 
Title: The Big Bang Theory (season 7)
Content: Regina King as Janine Davis ; Kevin Sussman as Stuart Bloom ; Christine Baranski as Dr. Beverly Hofstadter ; Bob Newhart as Dr. Arthur Jeffries/Professor Proton ; Kate Micucci as Lucy ; Carol Ann Susi as Mrs. Wolowitz ; Casey Sander as Mike Rostenkowski ; Brian Thomas Smith as Zack Johnson ; Wil Wheaton as himself ; John Ross Bowie as Dr. Barry Kripke ; Laurie Metcalf as Mary Cooper ; Ian Scott Rudolph as Captain Sweatpants ; Michael Massimino as himself ; Laura Spencer as Emily Sweeney ; Brian Posehn as Dr. "Bert" Bertram Kibbler ; Stephen Hawking as himself (voice-over) 
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 3)
Content: Katee Sackhoff as herself ; Ira Flatow as himself ; Stan Lee as himself ; James Earl Jones as himself ; Stephen Hawking as himself ; Elon Musk as himself 
Title: List of The Big Bang Theory and Young Sheldon characters
Content:  Susi, producers decided that Mrs. Wolowitz would die in the season-eight episode "The Comic Book Store Regeneration". Howard receives a phone call while in the store from his aunt Gladys in Florida, whom Mrs. Wolowitz had gone to visit. She says Mrs. Wolowitz had laid down for a nap and never woke up. Howard and Bernadette then move back into Howard's old home, and Stuart decides to stay with them. He eventually moves out halfway through season nine, allowing them to redecorate. Mrs. Wolowitz is also in the season-eleven episode “The Bitcoin Entanglement”, using archive recordings from previous episodes.
Title: The Big Bang Theory
Content:  Gilbert returned to The Big Bang Theory for its 200th episode. ; Melissa Rauch as Bernadette Rostenkowski-Wolowitz (recurring season 3, starring seasons 4–12): A young woman who initially is a co-worker at The Cheesecake Factory with Penny to pay her way through graduate school, where she is studying microbiology. Bernadette is introduced to Howard by Penny; at first, they do not get along, apparently having nothing in common. They date and later get engaged and married. Although generally a sweet and good-natured person, Bernadette has a short fuse and can be vindictive and lash out when provoked. ; Mayim Bialik as Amy Farrah Fowler (guest star season 
Title: The Big Bang Theory (season 9)
Content: Johnny Galecki as Dr. Leonard Hofstadter ; Jim Parsons as Dr. Sheldon Cooper ; Kaley Cuoco as Penny ; Simon Helberg as Howard Wolowitz ; Kunal Nayyar as Dr. Rajesh "Raj" Koothrappali ; Mayim Bialik as Dr. Amy Farrah Fowler ; Melissa Rauch as Dr. Bernadette Rostenkowski-Wolowitz ; Kevin Sussman as Stuart David Bloom ; Laura Spencer as Dr. Emily Sweeney 
Title: The Big Bang Theory (season 7)
Content: Sophie Oda as Grace ; Aaron Takahashi as a Scientist ; Todd Eric Andrews as Dr. Gunderson ; Morgan Hewitt as Lizzy ; Josh Peck as Jesse ; Tania Raymonde as Yvette ; Christopher Neiman as Dr. Dreyfus ; Kimberly Hebert Gregory as Ms. Davora ; Steve Valentine as Kenneth ; Monica Garcia as Maria 

Question: who does the voice of mrs. wolowitz on the big bang theory?
Answer: Carol Ann Susi.