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The Propagation Proposition

This episode is locked. New translations may be added.

Penny's ex-boyfriend, Zack, and his wife want a baby, but when Zack is infertile, they ask Leonard for help. Also, Koothrappali attempts to mend things with his ex-fiancée, Anu.

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  • Originally Aired January 10, 2019
  • Runtime 25 minutes
  • Content Rating United States of America TV-14
  • Production Code T12.16012
  • Network CBS
  • On Other Sites IMDB
  • Created April 29, 2019 by
    Administrator admin
  • Modified April 29, 2019 by
    Administrator admin
Name Type Role
Maria Ferrari Writer
Dave Goetsch Writer
Eric Kaplan Writer
Shay Ali Guest Star
Chip Chinery Guest Star
Brian George Guest Star
Brian Thomas Smith Guest Star
Lindsey Kraft Guest Star
Rati Gupta Guest Star
Mark Cendrowski Director
Chuck Lorre Creator
Bill Prady Creator