Watch The Big Bang Theory Online: Season 12 Episode 12
Paul Dailly
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Did Leonard want to help Penny's ex-boyfriend?
On The Big Bang Theory Season 12 Episode 12 Zack and his wife showed back up in town, and Zack told Leonard he was trying for a kid but was infertile.
However, Penny wondered why Zack would turn to Leonard when there are other people he could turn to.
Meanwhile, Koothrappali attempted to fix things with his ex-fiancée, Anu.
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