The Big Bang Theory/Season Nine

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Season Nine
The Big Bang Theory
Season Premiere September 21, 2015
Season Finale May 12, 2016
Episode Count 24
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Season Nine of The Big Bang Theory premiered on September 21, 2015.

Episodes

# # Title Written By Directed By Airdate Viewers 18-49 Rating Prod.
184 1 The Matrimonial Momentum Chuck Lorre &
Jim Reynolds &
Maria Ferrari
Mark Cendrowski September 21, 2015 18.203M 4.7% 4X7201
After driving to Vegas to get married, Penny struggles with Leonard's confession that he kissed another girl. Also, Sheldon doesn't know how to act after Amy pushes pause on their relationship.
Teleplay by Steven Molaro & Steve Holland & Eric Kaplan
185 2 The Separation Oscillation Steven Molaro &
Steve Holland &
Tara Hernandez
Mark Cendrowski September 28, 2015 15.231M 3.8% 4X7202
Leonard confronts the woman he kissed on the North Sea in an attempt to set Penny's mind at ease. Also, Sheldon films a special episode of "Fun with Flags" after his breakup with Amy, and Bernadette feels guilty about withholding a secret from Penny.
Teleplay by Chuck Lorre & Jim Reynolds & Maria Ferrari
186 3 The Bachelor Party Corrosion Dave Goetsch &
Jim Reynolds &
Jeremy Howe
Mark Cendrowski October 5, 2015 15.396M 3.9% 4X7203
The guys' science skills are put to the test when they get a flat tire during Leonard's bachelor party weekend in Mexico. Also, the girls force Penny to finally tell her family that she eloped with Leonard.
Teleplay by Steven Molaro & Steve Holland & Eric Kaplan
187 4 The 2003 Approximation Chuck Lorre &
Steve Holland &
Eric Kaplan
Mark Cendrowski October 12, 2015 14.957M 3.9% 4X7204
Sheldon learns of an impending change in his living arrangements and decides to revert back to 2003, a simpler time before he met Leonard and Penny. Also, Howard and Raj form a band to play at the Comic Book Store.
Teleplay by Steven Molaro & Maria Ferrari & Tara Hernandez
188 5 The Perspiration Implementation Chuck Lorre &
Eric Kaplan &
Maria Ferrari
Mark Cendrowski October 19, 2015 14.684M 3.9% 4X7205
The guys take a fencing lesson from Barry Kripke and Sheldon finds himself in an awkward position when Kripke expresses interest in Amy. Also, when Stuart struggles to get female customers at the Comic Book Store, Penny, Amy and Bernadette come by to help him out.
Teleplay by Steve Holland & Jim Reynolds & Saladin K. Patterson
189 6 The Helium Insufficiency Steve Holland &
Maria Ferrari &
Anthony Del Broccolo
Mark Cendrowski October 26, 2015 16.364M 4.4% 4X7207
In the midst of a nation-wide helium shortage, Sheldon and Leonard take desperate measures to get the supplies they need. Also, Penny and Bernadette download a dating app on Amy's phone to try and find her a new man.
Teleplay by Steven Molaro & Eric Kaplan & Jim Reynolds
190 7 The Spock Resonance Chuck Lorre &
Jim Reynolds &
Tara Hernandez
Nikki Lorre November 5, 2015 14.811M 3.7% 4X7206
While being interviewed for a documentary about Spock from "Star Trek," Sheldon struggles to suppress his emotions about his recent break-up with Amy. Also, Wolowitz and Bernadette butt heads over remodeling his childhood home.
Teleplay by Steven Molaro & Steve Holland & Jeremy Howe
191 8 The Mystery Date Observation Steven Molaro &
Eric Kaplan &
Jim Reynolds
Mark Cendrowski November 12, 2015 14.915M 3.7% 4X7208
Sheldon, Wolowitz and Koothrappali post an online advertisement to find Sheldon a new girlfriend. Also, when Amy is coy with details about a guy she is dating, Penny and Bernadette decide to spy.
Teleplay by Chuck Lorre & Steve Holland & Tara Hernandez
192 9 The Platonic Permutation Jim Reynolds &
Jeremy Howe &
Tara Hernandez
Mark Cendrowski November 19, 2015 15.194M 3.8% 4X7209
Sheldon and Amy try hanging out as friends when they spend Thanksgiving together at the aquarium. Also, Wolowitz reluctantly agrees to volunteer at the soup kitchen with Bernadette, Raj and Emily, and Penny discovers that Leonard knows more about her than she thought.
Teleplay by Steve Holland & Maria Ferrari & Adam Faberman
193 10 The Earworm Reverberation Eric Kaplan &
Jim Reynolds &
Saladin K. Patterson
Mark Cendrowski December 10, 2015 15.269M 3.8% 4X7210
Sheldon has a revelation when he realizes why a song was stuck in his head. Also, Amy invites Dave over for dinner despite their previously awkward date, and Wolowitz and Koothrappali become obsessed with a fan of their band, "Footprints on the Moon."
Teleplay by Steven Molaro & Steve Holland & Jeremy Howe
194 11 The Opening Night Excitation Steven Molaro &
Eric Kaplan &
Tara Hernandez
Mark Cendrowski December 17, 2015 17.225M 4.1% 4X7211
After more than five years of dating, Sheldon and Amy spend their first night together. Also, Leonard, Wolowitz, and Koothrappali must decide who will take their extra Star Wars movie ticket.
Teleplay by Steve Holland & Jim Reynolds & Maria Ferrari
195 12 The Sales Call Sublimation Steve Holland &
Jim Reynolds &
Saladin K. Patterson
Mark Cendrowski January 7, 2016 15.846M 3.8% 4X7212
Penny gets more than she bargained for when Leonard agrees to meet with a psychiatrist on her behalf. Also, Sheldon and Koothrappali collaborate on an astronomical discovery, and Wolowitz and Bernadette can't believe what they are feeling after Stuart moves out.
Teleplay by Steven Molaro & Maria Ferrari & Anthony Del Broccolo
196 13 The Empathy Optimization Chuck Lorre &
Eric Kaplan &
Dave Goetsch
Mark Cendrowski January 14, 2016 15.751M 3.8% 4X7213
After having to deal with a sick Sheldon, Leonard, Penny and the gang try to treat themselves to a Sheldon-free weekend.
Teleplay by Steven Molaro & Steve Holland & Saladin K. Patterson
197 14 The Meemaw Materialization Chuck Lorre &
Jim Reynolds &
Maria Ferrari
Mark Cendrowski February 4, 2016 15.29M 3.8% 4X7214
Sheldon's thrilled when his Meemaw comes to visit, but his excitement quickly fades when she butts heads with Amy. Also, Raj meets a new girl at the comic book store who makes him question his relationship with Emily.
Teleplay by Steven Molaro & Steve Holland & Tara Hernandez
198 15 The Valentino Submergence Steven Molaro &
Jim Reynolds &
Tara Hernandez
Mark Cendrowski February 11, 2016 16.249M 3.8% 4X7215
Sheldon and Amy host a live Valentine's Day episode of Fun with Flags, Leonard and Penny grapple with getting older, Howard and Bernadette find a surprise in their hot tub and Raj is torn between Emily and the cute girl he met at the Comic Bookstore.
Teleplay by Steve Holland & Eric Kaplan & Jeremy Howe
199 16 The Positive Negative Reaction Eric Kaplan &
Jim Reynolds &
Saladin K. Patterson
Mark Cendrowski February 18, 2016 15.24M 3.8% 4X7216
When the gang finds out about Bernadette's pregnancy, they celebrate by singing karaoke. Also, Bernadette is concerned when Wolowitz freaks out over her pregnancy announcement, and Wolowitz is convinced he must make more money to provide for the baby.
Teleplay by Steven Molaro & Steve Holland & Maria Ferrari
200 17 The Celebration Experimentation Chuck Lorre &
Eric Kaplan &
Jeremy Howe
Mark Cendrowski February 25, 2016 15.937M 3.8% 4X7217
After more than nine years together, the gang finally celebrates Sheldon's birthday, surprising him with a special guest.
Teleplay by Steven Molaro & Steve Holland & Tara Hernandez
201 18 The Application Deterioration Steven Molaro &
Eric Kaplan &
Adam Faberman
Mark Cendrowski March 10, 2016 14.682M 3.5% 4X7218
Leonard, Sheldon, and Wolowitz run into problems when they file for a patent for their infinite persistence gyroscope. Also, Penny, Amy and Bernadette give Koothrappali dating advice when Emily reaches out to him after their breakup.
Teleplay by Steve Holland & Jim Reynolds & Maria Ferrari
202 19 The Solder Excursion Diversion Bill Prady &
Eric Kaplan &
Maria Ferrari
Mark Cendrowski March 31, 2016 14.237M 3.5% 4X7219
Amy is shocked at a revelation from Sheldon after she buys him a new laptop. Also, Koothrappali sells out Leonard and Wolowitz after they lie to their wives in order to attend an early screening of a movie.
Teleplay by Steven Molaro & Steve Holland & Saladin K. Patterson
203 20 The Big Bear Precipitation Chuck Lorre &
Dave Goetsch &
Tara Hernandez
Mark Cendrowski April 7, 2016 13.502M 3.1% 4X7220
Sheldon spills a secret of Leonard's when the two take a weekend cabin trip with Penny and Amy. Also, when Koothrappali goes overboard with pregnancy gifts, Wolowitz and Bernadette must draw the line.
Teleplay by Steven Molaro & Steve Holland & Jim Reynolds
204 21 The Viewing Party Combustion Eric Kaplan &
Maria Ferrari &
Jeremy Howe
Mark Cendrowski April 21, 2016 14.155M 3.2% 4X7221
Everyone must choose sides when a small argument between Leonard and Sheldon erupts into a heated fight during a group get-together.
Teleplay by Steven Molaro & Steve Holland & Tara Hernandez
205 22 The Fermentation Bifurcation Steven Molaro &
Jim Reynolds &
Anthony Del Broccolo
Nikki Lorre April 28, 2016 14.129M 3.4% 4X7222
The gang goes to a wine bar and runs into Penny's old boyfriend, Zack. Also, Bernadette gets stuck spending the evening with Sheldon when she can't go wine tasting with the group, and things don't go as planned when Koothrappali introduces his new girlfriend, Claire.
Teleplay by Chuck Lorre & Steve Holland & Tara Hernandez
206 23 The Line Substitution Solution Steve Holland &
Saladin K. Patterson
& Tara Hernandez
Anthony Rich May 5, 2016 13.223M 3% 4X7223
Sheldon hires Stuart to spend the day with Amy when he'd rather go to a movie screening. Also, Leonard's mother, Beverly, comes to town and Penny struggles to make a connection with her.
Teleplay by Steven Molaro & Eric Kaplan & Maria Ferrari
207 24 The Convergence Convergence Steven Molaro &
Tara Hernandez &
Adam Faberman
Mark Cendrowski May 12, 2016 14.726M 3.4% 4X7224
Chaos ensues when Leonard's recently divorced parents, Alfred and Beverly, and Sheldon's devoutly religious mother, Mary, come to town. Also, Wolowitz and Koothrappali think the government is out to get them when they are contacted about their guidance system.
Teleplay by Chuck Lorre & Steve Holland & Jeremy Howe


The Big Bang Theory Seasons
Season 1 | Season 2 | Season 3 | Season 4 | Season 5 | Season 6 | Season 7 | Season 8 | Season 9 | Season 10