Season 9

Our two genius roommates, Leonard and Sheldon, and their friends are back once again (smarter, but no wiser). Last season, Sheldon went soul-searching (on a train, of course) and was prepared to make some substantial revisions on his Relationship Agreement with Amy, when everything changed. Leonard, meanwhile, was off to Vegas with Penny to finally tie the knot in the season finale. Howard finds himself alone with Bernadette after the sudden passing of his mother; while Raj is not only talking to women – he’s getting exclusive with Emily. Together, they will all learn that life is far more complicated outside of the lab as love and friendship never produce predictable results!

Season episodes list 9

S09E01

S09E01 : The Matrimonial Momentum 6.82/10 (aired on 09/21/2015)

Sheldon is confronted by a mystery of the universe he cannot unravel: when a woman wants time apart…
S09E02

S09E02 : The Separation Oscillation 7.51/10 (aired on 09/28/2015)

Leonard confronts the woman he kissed on the North Sea in an attempt to set Penny’s mind at ease.…
S09E03

S09E03 : The Bachelor Party Corrosion 7.8/10 (aired on 10/05/2015)

The guys’ science skills are put to the test when they get a flat tire during Leonard’s bachelor…
S09E04

S09E04 : The 2003 Approximation 7.5/10 (aired on 10/12/2015)

Leonard and Penny finally move in together leaving Sheldon very upset with this big change in his…
S09E05

S09E05 : The Perspiration Implementation 7.6/10 (aired on 10/19/2015)

The guys take a fencing lesson from Barry Kripke and Sheldon finds himself in an awkward position…
S09E06

S09E06 : The Helium Insufficiency 7.31/10 (aired on 10/26/2015)

In the midst of a nation-wide helium shortage, Sheldon and Leonard take desperate measures to get…
S09E07

S09E07 : The Spock Resonance 8.09/10 (aired on 11/05/2015)

Adam Nimoy, friend of Wil Wheaton and son of Leonard Nimoy, interviews Sheldon for a Star Trek…
S09E08

S09E08 : The Mystery Date Observation 8.09/10 (aired on 11/12/2015)

Amy has a formal date which Leonard, Penny and Bernadette secretly spy on. Sheldon has Howard and…
S09E09

S09E09 : The Platonic Permutation 8/10 (aired on 11/19/2015)

It’s Thanksgiving. Sheldon and Amy go on a lunch date to the aquarium as friends. Howard,…
S09E10

S09E10 : The Earworm Reverberation 8.39/10 (aired on 12/10/2015)

Sheldon has a revelation when he realizes why a song was stuck in his head. Also, Amy invites Dave…
S09E11

S09E11 : The Opening Night Excitation 9.19/10 (aired on 12/17/2015)

As the guys prepare to go to the premiere of the new Star Wars movie, Sheldon plans a special event…
S09E12

S09E12 : The Sales Call Sublimation 7.51/10 (aired on 01/07/2016)

Leonard visits a psychiatrist so Penny can make a sales call. Stuart moves out of the Wolowitz…
S09E13

S09E13 : The Empathy Optimization 7.51/10 (aired on 01/14/2016)

The gang decides to head to Vegas for the week on a party bus. Sheldon learns about the importance…
S09E14

S09E14 : The Meemaw Materialization 7.6/10 (aired on 02/04/2016)

Sheldon is thrilled when his Meemaw comes to visit, but his excitement quickly fades when she butts…
S09E15

S09E15 : The Valentino Submergence 7.61/10 (aired on 02/11/2016)

Sheldon and Amy host a live Valentine's Day episode of Fun with Flags, Leonard and Penny grapple…
S09E16

S09E16 : The Positive Negative Reaction 7.41/10 (aired on 02/18/2016)

When the gang finds out about Bernadette's pregnancy, they celebrate by singing karaoke. Also,…
S09E17

S09E17 : The Celebration Experimentation 7.5/10 (aired on 02/25/2016)

After more than nine years together, the gang finally celebrates Sheldon’s birthday, surprising him…
S09E18

S09E18 : The Application Deterioration 7.6/10 (aired on 03/10/2016)

Sheldon works up a contract to split their portion of their guidance system invention royalties,…
S09E19

S09E19 : The Solder Excursion Diversion 7.6/10 (aired on 03/31/2016)

Amy is shocked at a revelation from Sheldon after she buys him a new laptop. Koothrappali sells…
S09E20

S09E20 : The Big Bear Precipitation 7.5/10 (aired on 04/07/2016)

Secrets are revealed when Amy and Sheldon join Penny and Leonard on a weekend cabin trip. Raj is…
S09E21

S09E21 : The Viewing Party Combustion 7.6/10 (aired on 04/21/2016)

Everyone must choose sides when a small argument between Leonard and Sheldon erupts into a heated…
S09E22

S09E22 : The Fermentation Bifurcation 7.6/10 (aired on 04/28/2016)

Sheldon and Bernadette spend a night together while the rest of the gang goes to a wine tasting…
S09E23

S09E23 : The Line Substitution Solution 7.5/10 (aired on 05/05/2016)

Sheldon hires Stuart to spend the day with Amy when he’d rather go to a movie screening. Also,…
S09E24

S09E24 : The Convergence Convergence 7.81/10 (aired on 05/12/2016)

Leonard and Penny get remarried in front of their friends (who show up), Leonard's parents, Beverly…