The Big Bang Theory

The Explosion Implosion

Series 11 - Episode 4 The Explosion Implosion

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Summary

Leonard is devastated when his mother befriends Penny. Howard and Sheldon bond when they drive into the desert to shoot off a model rocket. Christine Baranski guest stars.

Cast & Crew

Leonard Hofstadter Johnny Galecki
Sheldon Cooper Jim Parsons
Penny Hofstadter Kaley Cuoco
Howard Wolowitz Simon Helberg
Raj Koothrappali Kunal Nayyar
Amy Farrah Fowler Mayim Bialik
Bernadette Rostenkowski Melissa Rauch
Dr Beverly Hofstadter Christine Baranski
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Sitcom