In The Big Bang Theory episode "The Celebration Experimentation" (the show's 200th episode!), after years of avoiding his birthday, Sheldon (Jim Parsons) agrees to celebrate his big day. Amy throws him a party with A-list guests including Batman actor Adam West, Stephen Hawking, Wil Wheaton (as himself), and other scientists including Leonard's psychoanalyst mother, Dr. Beverly Hofstadter.
Dr. Beverly Hofstadter is portrayed by Christine Baranski. She’s best known for her roles on The Good Wife (Diane Lockhart), Ugly Betty (Victoria Hartley), and Cybill (Maryann Thorpe). Baranski is also recognized for her roles on Broadway and on the big screen including Into the Woods (Stepmother), Momma Mia! (Tanya), How the Grinch Stole Christmas, The Birdcage, Bowfinger, Cruel Intentions, among others. The Big Bang Theory airs Thursdays at 8pm on CBS.The BEST SALES on Amazon NOW ]