Watch TV The Big Bang Theory Season 12 Episode 20 on 0123movies

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The Big Bang Theory Season 12 Episode 20

Koothrappali is worried people won't take him seriously in his own field after publishing a paper that suggests he may have discovered alien life. Also, Leonard wants to be the principal investigator on a plasma physics study.

Starring:

Jim Parsons, Johnny Galecki, Kaley Cuoco, Simon Helberg

Genre:

Comedy

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