The Big Bang Theory - Season 12 Episode 12
Seasons & Episodes
Episode Overview
Penny's ex-boyfriend Zack learns that he is infertile, so he asks Leonard for help; Koothrappali attempts to mend things with his ex-fiancee Anu.
Episode Details
Airdate: 2019-01-10
Episode Title: The Propagation Proposition
Runtime: 20
Director: Mark Cendrowski
Cast: Brian George, Brian Thomas Smith, Jim Parsons, Johnny Galecki, Kaley Cuoco, Kunal Nayyar, Mayim Bialik, Melissa Rauch, Rati Gupta, Simon Helberg
Episode Rating: 7.1 (2555 votes)
Country: USA
Release Year: 2019
Rotten Tomatoes: 81
Metacritic: 61
Episode Runtime: 22 min
Rated: TV-PG
First Air Date: 2007-09-24
Seasons: 12
Status: Ended
Creators: Mark Cendrowski, Anthony Rich, Chuck Lorre
Awards: Won 10 Primetime Emmys, 79 wins & 257 nominations total
Tagline: Smart is the new sexy.
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