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'The Big Bang Theory' Series Finale: Fan theory questions if Leonard and Penny break up in final season

For the past couple of seasons, 'Big Bang Theory' has always hinted around the fact that Leonard and Penny do not have much in common, this might be the reason for the theory.

The 'Big Bang Theory' is coming to end after 12 seasons. And in barely few more months, the finale will be done and dusted. But before the show can bid its goodbye, fans have a lot of questions regarding the show and how it will end. The most popular one among them is about the relationship between Leonard Hofstadter (Johnny Galecki) and his wife Penny (Kaley Cuoco).