The Expedition Approximation
Season 8, Ep. 6
Sheldon and Raj undertake an underground research expedition that turns into a test of how long before they get under each other's skin. Meanwhile, Leonard and Penny argue about money, and go to Wolowitz and Bernadette for advice.
First Aired: October 20, 2014.
The Focus Attenuation
Season 8, Ep. 5
With the girls away in Vegas for the weekend, the guys try to invent “the next big thing,” but only come up with new ways to procrastinate.
First Aired: October 13, 2014.
The Hook-Up Reverberation
Season 8, Ep. 4
Raj's girlfriend, Emily, gives Penny the cold shoulder after he reveals some info about their past history; and the guys contemplate buying into Stuart's comic-book emporium.
First Aired: October 6, 2014.
The First Pitch Insufficiency
Season 8, Ep. 3
A nervous Wolowitz is thrown for a loop when NASA asks him to toss out the first pitch at a Los Angeles Angels baseball game. Meanwhile, Sheldon brags that he and Amy are a better couple than Leonard and Penny, so they set out to prove he's way off base.
First Aired: September 29, 2014.
READ: 'The Big Bang Theory' couples take on Major League Baseball and one another in an all-new episode
The Junior Professor Solution
Season 8, Ep. 2
Sheldon is ordered to teach a class, and the gang is surprised when Howard signs up to take it; and tensions between Penny and Bernadette afford Amy an opportunity to play one against the other.
First Aired: September 22, 2014.
The Locomotion Interruption
Season 8, Ep. 1
In the series 8 premiere, Amy and Leonard take a surprise road trip to Arizona to retrieve Sheldon, while Penny goes on a job interview at Bernadette's company, and Howard has problems wrapping his head around Stuart's relationship with Mrs. Wolowitz.
First Aired: September 22, 2014.
The Status Quo Combustion: FINALE
Season 7, Ep. 24
Faced with an uncertain future, Sheldon considers a major change; Emily and Raj decide to take things to the next level.
First Aired: May 15, 2014
READ: ‘The Big Bang Theory’ finale could mark a big change for Sheldon Cooper
The Gorilla Dissolution
Season 7, Ep. 23
A bad day compels Penny to re-evaluate her choices -- including Leonard; Bernadette and Howard must care for Mrs. Wolowitz; Sheldon gives Raj advice on relationships.
First Aired: May 8, 2014
The Proton Transmogrification
Season 7, Ep. 22
Professor Proton (Bob Newhart) helps Sheldon deal with grief; Leonard gets into a competition with Penny; Bernadette and Amy prepare a ``Star Wars Day'' gift for the guys.
First Aired: May 1, 2014
The Anything Can Happen Recurrence
Season 7, Ep. 21
Sheldon gives spontaneity a try, which causes unexpected friction for Penny, Bernadette and Amy; Raj asks Howard for help with preparation for a date with Emily.
First Aired: April 24, 2014
The Relationship Diremption
Season 7, Ep. 20
Sheldon faces a personal crisis after deciding he's wasting his time with string theory. Meanwhile, a double date between Raj, Emily and the Wolowitzes ends in embarrassment for Howard.
First Aired: April 10, 2014
The Indecision Amalgamation
Season 7, Ep. 19
Raj struggles with guilt when he dates two women at once; Penny has a chance to play a part in a cheesy movie; Sheldon is torn between two gaming systems.
READ: The 'Big Bang Theory' gang is wracked with indecision
First aired: April 3, 2014
The Mommy Observation
Season 7, Ep. 18
Sheldon is faced with a new reality when he visits his mom in Houston; a murder mystery party starts arguments.
First aired: March 13, 2014
The Friendship Turbulence
Season 7, Ep. 17
Bernadette tries to negotiate peace between Sheldon and Wolowitz; Penny receives an embarrassing offer; Raj wants Amy to write to a woman on his behalf.
READ: The turbulence is both literal and figurative for Sheldon and Howard on 'Big Bang Theory'
First aired: March 6, 2014
The Table Polarization
Season 7, Ep. 16
When Leonard buys a dining room table, Sheldon re-evaluates the changes in his life; Bernadette is torn when Wolowitz gets the chance to go back to space.
First aired on February 27, 2014
The Locomotive Manipulation
Season 7, Ep. 15
Love is in the air when Amy convinces Sheldon to join her (as well as Howard and Bernadette) for a romantic weekend in Napa Valley to celebrate Valentine’s Day.
First aired on February 6, 2014
The Convention Conundrum
Season 7, Ep. 14
Unable to get Comic-Con tickets, Sheldon tries to hold his own convention and ends up spending a wild evening with James Earl Jones; the ladies try to act maturely.
First Aired: January 30, 2014
The Occupation Recalibration
Season 7, Ep. 13
Sheldon must learn how to relax when he is forced to take a vacation; Leonard tries to support Penny when she quits her job; Bernadette needs to replace one of Stuart's comic books.
First Aired: January 9, 2014
The Hesitation Ramification
Season 7, Ep. 12
As Leonard tries to help Penny with a disappointment, Penny asks him a bold question about their relationship; Sheldon wants to learn how to be funny.
First Aired: January 2, 2014
The Cooper Extraction
Season 7, Ep. 11
While Sheldon is in Texas, the rest of the gang realize how much he has changed their lives as they decorate the apartment Christmas tree.
First Aired: December 12, 2013
The Discovery Dissipation
Season 7, Ep. 10
Amy and Leonard try to help Sheldon deal with his shame; Raj stays with Bernadette and Howard for a week.
First Aired: December 5, 2013
The Thanksgiving Decoupling
Season 7, Ep. 9
When the gang decides to spend Thanksgiving at Mrs. Wolowitz's house, Sheldon protests; Leonard and Penny deal with an error from her past.
First Aired: November 21, 2013
The Itchy Brain Simulation
Season 7, Ep. 8
When a mistake comes to light, Sheldon makes Leonard walk a mile in his shoes; Penny decides to confront Raj's ex.
READ: It's Leonard vs. The Sweater of Red Death
First Aired: November 14, 2013
The Proton Displacement
Season 7, Ep. 7
When Professor Proton asks Leonard for help with an experiment, Sheldon retaliates by befriending Proton's rival, Bill Nye.
READ: It's Bill Nye the Science Guy vs. Professor Proton, played by Bob Newhart
First Aired: November 7, 2013
The Romance Resonance
Season 7, Ep. 6
Sheldon's latest scientific breakthrough leaves him feeling like a fraud; a romantic gesture between Howard and Bernadette causes Penny to up her game with Leonard.
First Aired: October 24, 2013