The Big Bang Theory

The Explosion Implosion (Season 11, Episode 4)

TV-PG

TV Episode | 21 min | Comedy, Romance

Howard and Bernadette are disappointed when they find out the sex of the baby. Leonard is annoyed when his mother befriends Penny.

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Cast	+ Add Cast
10 cast members

Name	Known for
Johnny Galecki Leonard Hofstadter Leonard Hofstadter See fewer	The Big Bang Theory (2007)
Jim Parsons Sheldon Cooper Sheldon Cooper See fewer	The Big Bang Theory (2007)
Kaley Cuoco Penny Hofstadter Penny Hofstadter See fewer	The Big Bang Theory (2007)
Simon Helberg Howard Wolowitz Howard Wolowitz See fewer	Florence Foster Jenkins (2016)
Kunal Nayyar Raj Koothrappali Raj Koothrappali See fewer	The Big Bang Theory (2007)
Mayim Bialik Amy Farrah Fowler Amy Farrah Fowler See fewer	Beaches (1988)
Melissa Rauch Bernadette Rostenkowski Bernadette Rostenkowski See fewer	The Big Bang Theory (2007)
Christine Baranski Dr. Beverly Hofstadter Dr. Beverly Hofstadter See fewer	Mamma Mia! (2008)
Dana L. Wilson Dr. Sanders Dr. Sanders See fewer	To the Bone (I) (2017)
Michael Patrick McGill Police Officer Police Officer See fewer	Annabelle Comes Home (2019)