Season 9 poster

Season 9

(2015)

Overview

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 …

Cast

Johnny Galecki as Leonard Hofstadter
Johnny Galecki

as Leonard Hofstadter

Jim Parsons as Sheldon Cooper
Jim Parsons

as Sheldon Cooper

Kaley Cuoco as Penny
Kaley Cuoco

as Penny

Simon Helberg as Howard Wolowitz
Simon Helberg

as Howard Wolowitz

Kunal Nayyar as Rajesh Koothrappali
Kunal Nayyar

as Rajesh Koothrappali

Melissa Rauch as Bernadette Rostenkowski
Melissa Rauch

as Bernadette Rostenkowski

Mayim Bialik as Amy Farrah Fowler
Mayim Bialik

as Amy Farrah Fowler

Episodes

The Matrimonial Momentum poster

The Matrimonial Momentum 7.2

September 21, 2015

After driving to Vegas to get married, Penny struggles with Leonard’s confession that he kissed another girl. Also, She…

The Separation Oscillation poster

The Separation Oscillation 7.2

September 28, 2015

Leonard confronts the woman he kissed on the North Sea in an attempt to set Penny's mind at ease. Also, Sheldon films a…

The Bachelor Party Corrosion poster

The Bachelor Party Corrosion 7.3

October 5, 2015

The guys' science skills are put to the test when they get a flat tire during Leonard's bachelor party weekend in Mexic…

The 2003 Approximation poster

The 2003 Approximation 7.4

October 12, 2015

Sheldon learns of an impending change in his living arrangements and decides to revert back to 2003, a simpler time bef…

The Perspiration Implementation poster

The Perspiration Implementation 6.9

October 19, 2015

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

The Helium Insufficiency poster

The Helium Insufficiency 7.1

October 26, 2015

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

The Spock Resonance poster

The Spock Resonance 7.6

November 5, 2015

Wil Wheaton interviews Sheldon for a Star Trek documentary where he reveals the ring and his plan to propose to Amy. B…

The Mystery Date Observation poster

The Mystery Date Observation 7.5

November 12, 2015

Sheldon, Wolowitz and Koothrappali post an online advertisement to find Sheldon a new girlfriend. Also, when Amy is coy…

The Platonic Permutation poster

The Platonic Permutation 7.5

November 19, 2015

Sheldon and Amy try hanging out as friends when they spend Thanksgiving together at the aquarium. Also, Wolowitz reluct…

The Earworm Reverberation poster

The Earworm Reverberation 7.9

December 10, 2015

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

The Opening Night Excitation poster

The Opening Night Excitation 8.2

December 17, 2015

After more than five years of dating, Sheldon and Amy spend their first night together. Also, Leonard, Wolowitz, and Ko…

The Sales Call Sublimation poster

The Sales Call Sublimation 7.3

January 7, 2016

Penny gets more than she bargained for when Leonard agrees to meet with a psychiatrist on her behalf. Also, Sheldon and…

The Empathy Optimization poster

The Empathy Optimization 7.3

January 14, 2016

After having to deal with a sick Sheldon, Leonard, Penny and the gang try to treat themselves to a Sheldon-free weekend.

The Meemaw Materialization poster

The Meemaw Materialization 7.2

February 4, 2016

Meemaw meets Amy, but it isn't all roses. Meemaw seems to have an axe to grind with her. Sheldon comes to Amy's defense…

The Valentino Submergence poster

The Valentino Submergence 7.2

February 11, 2016

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

The Positive Negative Reaction poster

The Positive Negative Reaction 7.3

February 18, 2016

When the gang finds out about Bernadette’s pregnancy, they celebrate by singing karaoke. Also, Bernadette is concerned…

The Celebration Experimentation poster

The Celebration Experimentation 7.3

February 25, 2016

After more than nine years together, the gang finally celebrates Sheldon’s birthday, surprising him with a special gues…

The Application Deterioration poster

The Application Deterioration 7.3

March 10, 2016

Leonard, Sheldon, and Wolowitz run into problems when they file for a patent for their infinite persistence gyroscope. …

The Solder Excursion Diversion poster

The Solder Excursion Diversion 7.3

March 31, 2016

Amy is shocked at a revelation from Sheldon after she buys him a new laptop. Also, Koothrappali sells out Leonard and W…

The Big Bear Precipitation poster

The Big Bear Precipitation 7.3

April 7, 2016

Sheldon spills a secret of Leonard’s when the two take a weekend cabin trip with Penny and Amy. Also, when Koothrappal…

The Viewing Party Combustion poster

The Viewing Party Combustion 7.0

April 21, 2016

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

The Fermentation Bifurcation poster

The Fermentation Bifurcation 7.2

April 28, 2016

The gang goes to a wine bar and runs into Penny’s old boyfriend, Zack. Also, Bernadette gets stuck spending the evening…

The Line Substitution Solution poster

The Line Substitution Solution 7.2

May 5, 2016

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

The Convergence Convergence poster

The Convergence Convergence 7.6

May 12, 2016

Chaos ensues when Leonard’s recently divorced parents, Alfred and Beverly, and Sheldon’s devoutly religious mother, Mar…