The Big Bang Theory - Episode 4 (The Explosion Implosion)
Wolowitz and Sheldon bond over their relationships with their disappointing fathers when they drive to the desert to shoot off a model rocket. Meanwhile, Leonard's mom finds a new best friend in Penny, much to Leonard's dismay.
The Big Bang Theory was broadcast on Channel 9 at Wednesday 8 November 2017, 20:53.
Episode 4 (The Explosion Implosion)
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