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The Propagation Proposition
CBS
The Propagation Proposition (S12E12) is the twelfth episode of season twelve of "The Big Bang T... More The Propagation Proposition (S12E12) is the twelfth episode of season twelve of "The Big Bang Theory" released on Thu Jan 10, 2019. Over 19,756 TV Time users rated it a 6.96/10 with their favorite characters being Johnny Galecki as Leonard Hofstadter, Kunal Nayyar as Rajesh Koothrappali and Kaley Cuoco as Penny.
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