Episode Guide

The Opening Night Excitation

The Opening Night Excitation

Season 9, Ep. 11

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.

First Aired: December 17, 2015. 

The Platonic Permutation

The Platonic Permutation

Season 9, Ep. 9

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.

First Aired: November 19, 2015.

The Mystery Date Observation

The Mystery Date Observation

Season 9, Ep. 8

When Leonard, Penny and Bernadette learn that Amy is going out on a dinner date, the trio set out to spy on her and the guy. Meanwhile, Sheldon recruits Raj and Howard to find a woman for him, since they were responsible for getting Amy and him together.

First Aired: November 12, 2015. 

The Spock Resonance

The Spock Resonance

Season 9, Ep. 7

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.

First Aired: November 5, 2015. 

The Helium Insufficiency

The Helium Insufficiency

Season 9, Ep. 6

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.

First Aired: October 26, 2015. 

The Perspiration Implementation

The Perspiration Implementation

Season 9, Ep. 5

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.

First Aired: October 19, 2015.

The 2003 Approximation

The 2003 Approximation

Season 9, Ep. 4

When Leonard and Penny move in together, Sheldon is very upset and longs for an emotion-free life like what he had in 2003. Meanwhile, Howard and Raj attempt to form a band.

First Aired: October 12, 2015.

The Bachelor Party Corrosion

The Bachelor Party Corrosion

Season 9, Ep. 3

The guys get together to throw Leonard a bachelor party in Mexico only to have car trouble put a damper on their plans. Meanwhile, Bernadette and Amy urge Penny to tell her parents that she is married.

First Aired: October 5, 2015.

The Separation Oscillation

The Separation Oscillation

Season 9, Ep. 2

As Leonard and Penny struggle with the revelation he kissed another woman, Leonard goes to meet the woman in question. Elsewhere, Sheldon films an episode of Fun with Flags alone following his break-up with Amy.Meanwhile, Bernadette is uncomfortable with the fact she's known about Leonard's kiss for two years.

First Aired: September 28, 2015. 

PREMIERE: The Matrimonial Momentum

PREMIERE: The Matrimonial Momentum

Season 9, Ep. 1

Penny and Leonard deal with Leonard's confession on the way down the aisle while Sheldon struggles to understand Amy's decision to take a step back from their relationship.

First Aired: September 21, 2015. 

FINALE: The Commitment Determination

FINALE: The Commitment Determination

Season 8, Ep. 24

Leonard and Penny are pressured to set a wedding date by Sheldon, whose relationship with Amy has taken an interesting turn.

First Aired: May 7, 2015 

The Maternal Combustion

The Maternal Combustion

Season 8, Ep. 23

Sheldon's and Leonard's mothers finally come face to face and their personalities collide.

First Aired: April 30, 2015. 

The Graduation Transmission

The Graduation Transmission

Season 8, Ep. 22

Leonard and Penny are headed to New Jersey, where Leonard is scheduled to give a high school commencement speech. Raj's father is tired of his reckless spending habits.

First Aired: April 23, 2015. 

The Communication Deterioration

The Communication Deterioration

Season 8, Ep. 21

The guys clash about a message that could be used for contacting aliens.

First Aired: April 16, 2015. 

The Fortification Implementation

The Fortification Implementation

Season 8, Ep. 20

When Sheldon and Amy build a blanket fort, they come to major crossroads in their relationship. Also, Wolowitz meets the half-brother he never knew he had.

First Aired: April 9, 2015. 

The Skywalker Incursion

The Skywalker Incursion

Season 8, Ep. 19

While on their way to UC Berkeley, Sheldon and Leonard take a detour in hope of meeting an idol.

First Aired: April 2, 2015.

The Leftover Thermalization

The Leftover Thermalization

Season 8, Ep. 18

A magazine article only credits Sheldon in an article about a paper he co-wrote with Leonard.

First Aired: March 12, 2015.

The Colonization Application

The Colonization Application

Season 8, Ep. 17

Amy finds out that Sheldon applied for a one-way mission to colonize Mars.

First Aired: March 05, 2015.

The Intimacy Acceleration

The Intimacy Acceleration

Season 8, Ep. 16

Penny and Sheldon design an experiment -- as a joke -- to make participants fall in love.

First Aired: February 26, 2015.


The Comic Book Store Regeneration

The Comic Book Store Regeneration

Season 8, Ep. 15

Amid the excitement of Stuart reopening his comic-book store, Howard gets some unsettling news; and after teaching Sheldon how to "let it go," Penny doesn't practice what she preaches when she learns something maddening about Amy. 

First Aired: February 19, 2015. 

The Troll Manifestation

The Troll Manifestation

Season 8, Ep. 14

An online troll rips Leonard and Sheldon's published physics paper, so the guys rally to defend the two and expose the bully, while a girls night out leads to Penny, Amy and Bernadette dishing about embarrassing past events.

First Aired: February 5, 2015. 

The Anxiety Optimization

The Anxiety Optimization

Season 8, Ep. 13

Sheldon becomes concerned that his cushy lifestyle is impacting his professional progress and keeping him from achieving scientific renown, so he asks the gang to make life more difficult for him. Meanwhile, Howard invents an unflattering game about Raj.

First Aired: January 29, 2015. 

The Space Probe Disintegration

The Space Probe Disintegration

Season 8, Ep. 12

While Raj eagerly awaits data from a space probe in which he was involved, Howard keeps distracting him. Later, dress shopping with Penny and Amy doesn't exactly prove to be a good fit for Leonard and Sheldon.

First Aired: January 8, 2015. 

The Clean Room Infiltration

The Clean Room Infiltration

Season 8, Ep. 11

On Christmas Eve, Amy plans a traditional Victorian dinner, while Raj, Leonard and Howard scramble to remove a pigeon that flew into the clean room at the university. To prove a point to Amy, a Scrooge-like Sheldon buys her the worst possible gift.

First Aired: December 11, 2014. 

The Champagne Reflection

The Champagne Reflection

Season 8, Ep. 10

It's a banner day for Sheldon as he bids a sad farewell to his "Fun With Flags" podcast. Meanwhile, Leonard, Howard and Raj probe a late professor's research in search of some hidden significance; and Bernadette is surprised when Penny reveals how her co-workers really feel about her.

First Aired: November 20, 2014

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