The Big Bang Theory backdrop

The Big Bang Theory S12E12 — The Propagation Proposition

7.1

The Big Bang Theory•Season 12•Episode 12

The Propagation Proposition

7.1/10 · 2,928 votesJan 10, 201920 min

Ranked #16 of 24 in Season 12•−0.4 vs season avg

Penny runs into her ex-boyfriend, Zack, who invites her and Leonard to a dinner to meet his newlywed wife. After the dinner the newlywed couple make an odd proposition to Leonard, which makes Penny to freak out. Also, Raj attempts to mend things with his

Directed byMark Cendrowski

Previous episodeE11 · The Paintball Scattering Next episodeE13 · The Confirmation Polarization

Seasons12

All 1 2 3 4 5 6 7 8 9 10 11 12

Cast7

Johnny Galecki

Johnny Galecki

Leonard Hofstadter

Jim Parsons

Jim Parsons

Sheldon Cooper

Kaley Cuoco

Kaley Cuoco

Penny

Simon Helberg

Simon Helberg

Howard Wolowitz

Kunal Nayyar

Kunal Nayyar

Rajesh Koothrappali

Melissa Rauch

Melissa Rauch

Bernadette Rostenkowski

Mayim Bialik

Mayim Bialik

Amy Farrah Fowler

Crew6

Mark Cendrowski

Mark Cendrowski

Director

Steve Holland

Steve Holland

Story

David Goetsch

David Goetsch

Teleplay

Eric Kaplan

Eric Kaplan

Teleplay

Jeremy Howe

Jeremy Howe

Story

Maria Ferrari

Maria Ferrari

Teleplay

Discussion

0 comments

Join the conversation

Share your take and reply to other fans.

No comments yet

Be the first to share your thoughts on this episode.

Episode Summary

"The Propagation Proposition" is episode 12 of The Big Bang Theory season 12. It scored 7.1/10 from 2,928 votes, ranking #16 of 24 episodes this season (season average 7.5). Directed by Mark Cendrowski, it aired on January 10, 2019.

Next: E13 · The Confirmation Polarization Best of Season 12