The Big Bang Theory - Season 12 Episode 12

Seasons & Episodes

Episode 1

The Big Bang Theory – S12E01 – The Conjugal Configuration

Episode 2

The Big Bang Theory – S12E02 – The Wedding Gift Wormhole

Episode 3

The Big Bang Theory – S12E03 – The Procreation Calculation

Episode 4

The Big Bang Theory – S12E04 – The Tam Turbulence

Episode 5

The Big Bang Theory – S12E05 – The Planetarium Collision

Episode 6

The Big Bang Theory – S12E06 – The Imitation Perturbation

Episode 7

The Big Bang Theory – S12E07 – The Grant Allocation Derivation

Episode 8

The Big Bang Theory – S12E08 – The Consummation Deviation

Episode 9

The Big Bang Theory – S12E09 – The Citation Negation

Episode 10

The Big Bang Theory – S12E10 – The VCR Illumination

Episode 11

The Big Bang Theory – S12E11 – The Paintball Scattering

Episode 12 Current

The Big Bang Theory – S12E12 – The Propagation Proposition

Episode 13

The Big Bang Theory – S12E13 – The Confirmation Polarization

Episode 14

The Big Bang Theory – S12E14 – The Meteorite Manifestation

Episode 15

The Big Bang Theory – S12E15 – The Donation Oscillation

Episode 16

The Big Bang Theory – S12E16 – The D & D Vortex

Episode 17

The Big Bang Theory – S12E17 – The Conference Valuation

Episode 18

The Big Bang Theory – S12E18 – The Laureate Accumulation

Episode 19

The Big Bang Theory – S12E19 – The Inspiration Deprivation

Episode 20

The Big Bang Theory – S12E20 – The Decision Reverberation

Episode 21

The Big Bang Theory – S12E21 – The Plagiarism Schism

Episode 22

The Big Bang Theory – S12E22 – The Maternal Conclusion

Episode 23

The Big Bang Theory – S12E23 – The Change Constant

Episode 24

The Big Bang Theory – S12E24 – The Stockholm Syndrome

The Big Bang Theory

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.

Ratings

IMDb 7.1

Details

Episode Title The Propagation Proposition

Airdate 2019-01-10

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

Genre Comedy, Romance

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.

View All Episodes of The Big Bang Theory