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The Big Bang Theory Episode Details |
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First Episode Pilot |
Previous Episode The Paintball Scattering |
Next Episode The Confirmation Polarization |
Last Episode The Stockholm Syndrome |
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The Propagation Proposition Season 12 - Episode 12 |
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Penny's ex-boyfriend, Zack, and his wife want a baby, but when Zack is infertile, they ask Leonard for help. Also, Koothrappali attempts to mend things with his ex-fiancée, Anu.
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| Production Number: | |
| Aired On: | Thursday 10th of January 2019 on CBS ( US ) |
| Written by: | TBA |
| Directed by: | TBA |
| Starring: | TBA |
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