The BEST Episodes of The Big Bang Theory

Every episode ever - ranked by fan votes!

Last Updated: Mar 6, 2021

Network: CBS

A woman who moves into an apartment across the hall from two brilliant but socially awkward physicists shows them how little they know about life outside of the laboratory.

The Stockholm Syndrome

#1 - The Stockholm Syndrome

Season 12 - Episode 24 - Aired May 16, 2019

Bernadette and Wolowitz leave their kids for the first time; Penny and Leonard try to keep a secret; Sheldon and Amy stick together; and Koothrappali makes a new friend, as the gang travels together into an uncharted future.

star 8.55
2,874 votes
Directors: Mark Cendrowski
Writers: Adam Faberman, Andy Gordon, Anthony Del Broccolo, Bill Prady, Chuck Lorre, Dave Goetsch, Eric Kaplan, Jeremy Howe, Maria Ferrari, Steve Holland, Steven Molaro, Tara Hernandez
The Change Constant

#2 - The Change Constant

Season 12 - Episode 23 - Aired May 16, 2019

Sheldon and Amy await big news.

star 8.35
3,681 votes
Directors: Mark Cendrowski
Writers: Adam Faberman, Andy Gordon, Anthony Del Broccolo, Bill Prady, Chuck Lorre, Dave Goetsch, Eric Kaplan, Jeremy Howe, Maria Ferrari, Steve Holland, Steven Molaro, Tara Hernandez
The Long Distance Dissonance

#3 - The Long Distance Dissonance

Season 10 - Episode 24 - Aired May 11, 2017

The gang is concerned when Sheldon’s former admirer, Dr. Ramona Nowitzki, resurfaces while Amy is away at Princeton.

star 8.20
10,023 votes
Directors: Mark Cendrowski
Writers: Chuck Lorre, Steve Holland, Tara Hernandez
The Opening Night Excitation

#4 - The Opening Night Excitation

Season 9 - Episode 11 - Aired Dec 17, 2015

As the guys prepare to go to the premiere of the new Star Wars movie, Sheldon plans a special event for Amy's birthday.

star 8.19
8,099 votes
Directors: Mark Cendrowski
Writers: Jim Reynolds, Maria Ferrari, Steven Molaro
The Bow Tie Asymmetry

#5 - The Bow Tie Asymmetry

Season 11 - Episode 24 - Aired May 10, 2018

When Amy’s parents and Sheldon’s family arrive for the wedding, everybody is focused on making sure all goes according to plan – everyone except the bride and groom.

star 8.19
4,703 votes
Directors: Mark Cendrowski
Writers: Eric Kaplan, Steve Holland, Tara Hernandez
The Bath Item Gift Hypothesis

#6 - The Bath Item Gift Hypothesis

Season 2 - Episode 11 - Aired Dec 15, 2008

Penny starts dating Leonard's handsome colleague; Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.

star 8.17
12,706 votes
Directors: Mark Cendrowski
Writers: Eric Kaplan, Stephen Engel
The Thanksgiving Decoupling

#7 - The Thanksgiving Decoupling

Season 7 - Episode 9 - Aired Nov 21, 2013

An upset Sheldon protests when the entire gang drags him to Mrs. Wolowitz's house for Thanksgiving. Meanwhile, Penny and Leonard must deal with a mistake from her past.

star 8.17
9,712 votes
Directors: Mark Cendrowski
Writers: Jeremy Howe, Jim Reynolds, Steven Molaro
The Good Guy Fluctuation

#8 - The Good Guy Fluctuation

Season 5 - Episode 7 - Aired Oct 27, 2011

A cute comic book artist puts Leonard and Priya’s relationship to the test, while Sheldon tries to scare the guys for Halloween.

star 8.07
13,319 votes
Directors: Mark Cendrowski
Writers: Bill Prady, Steve Holland, Steven Molaro
The Roommate Transmogrification

#9 - The Roommate Transmogrification

Season 4 - Episode 24 - Aired May 19, 2011

When Bernadette receives her PhD, Wolowitz feels emasculated. Raj and Leonard swap apartments and Penny does something she regrets.

star 8.06
13,613 votes
Directors: Mark Cendrowski
Writers: Bill Prady, Eric Kaplan, Jim Reynolds
The Romance Resonance

#10 - The Romance Resonance

Season 7 - Episode 6 - Aired Oct 24, 2013

Sheldon's latest scientific breakthrough makes him feel like a fraud – and threatens to haunt him forever. Meanwhile, Howard's romantic gesture to Bernadette causes Penny to step up her game with Leonard.

star 8.06
10,116 votes
Directors: Mark Cendrowski
Writers: Maria Ferrari, Steve Holland, Steven Molaro
The Fish Guts Displacement

#11 - The Fish Guts Displacement

Season 6 - Episode 10 - Aired Dec 6, 2012

When Amy gets sick, Sheldon tries to nurse her back to health; Wolowitz and his father-in-law plan a fishing trip.

star 8.05
10,880 votes
Directors: Mark Cendrowski
Writers: Eric Kaplan, Jim Reynolds, Steven Molaro
The Egg Salad Equivalency

#12 - The Egg Salad Equivalency

Season 6 - Episode 12 - Aired Jan 3, 2013

When Sheldon is accused of sexual harassment, he ends up getting Raj, Leonard and Wolowitz in trouble too.

star 8.04
9,999 votes
Directors: Mark Cendrowski
Writers: Bill Prady, Steve Holland, Steven Molaro
The Indecision Amalgamation

#13 - The Indecision Amalgamation

Season 7 - Episode 19 - Aired Apr 3, 2014

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.

star 8.04
8,527 votes
Directors: Anthony Rich
Writers: David Goetsch, Steve Holland, Steven Molaro
The Pants Alternative

#14 - The Pants Alternative

Season 3 - Episode 18 - Aired Mar 22, 2010

Sheldon's friends come to his aid when his fear of public speaking stands between him and a coveted award.

star 8.02
12,966 votes
Directors: Mark Cendrowski
Writers: Eric Kaplan, Jim Reynolds, Richard Rosenstock
The Closure Alternative

#15 - The Closure Alternative

Season 6 - Episode 21 - Aired Apr 25, 2013

Amy tries to help Sheldon get over his compulsive need for closure when one of his favorite TV shows is canceled; Raj discovers a secret about Lucy.

star 8.02
10,087 votes
Directors: Mark Cendrowski
Writers: Jim Reynolds, Steve Holland, Steven Molaro
The Countdown Reflection

#16 - The Countdown Reflection

Season 5 - Episode 24 - Aired May 10, 2012

As Howard's mission to space approaches, Howard and Bernadette decide to get married before his launch, causing the gang to scurry into overdrive in an effort to stage the wedding.

star 8.00
11,610 votes
Directors: Mark Cendrowski
Writers: Chuck Lorre, Jim Reynolds, Steven Molaro
The Locomotive Manipulation

#17 - The Locomotive Manipulation

Season 7 - Episode 15 - Aired Feb 6, 2014

On Valentine's Day, Sheldon and Amy go on a trip to wine country with Howard and Bernadette; Penny and Leonard rush Raj's dog to the vet.

star 7.98
8,787 votes
Directors: Mark Cendrowski
Writers: Eric Kaplan, Maria Ferrari, Steven Molaro
The Bakersfield Expedition

#18 - The Bakersfield Expedition

Season 6 - Episode 13 - Aired Jan 10, 2013

As the guys don costumes and go on a road trip to a comic book convention, the ladies decide to stay home and try to interpret a comic book.

star 7.98
10,055 votes
Directors: Mark Cendrowski
Writers: Eric Kaplan, Maria Ferrari, Steven Molaro
The Lunar Excitation

#19 - The Lunar Excitation

Season 3 - Episode 23 - Aired May 24, 2010

While Penny worries that dating Leonard has ruined her for normal guys, Wolowitz and Koothrappali search for Sheldon's perfect match online.

star 7.97
13,065 votes
Directors: Peter Chakos
Writers: Lee Aronsohn, Steve Holland, Steven Molaro
The Scavenger Vortex

#20 - The Scavenger Vortex

Season 7 - Episode 3 - Aired Oct 3, 2013

When the entire gang competes in a cutthroat scavenger hunt designed by Raj that tests their science knowledge and street smarts, it brings out the best – and worst – in everyone.

star 7.97
10,179 votes
Directors: Mark Cendrowski
Writers: Jim Reynolds, Maria Ferrari, Steven Molaro
The 43 Peculiarity

#21 - The 43 Peculiarity

Season 6 - Episode 8 - Aired Nov 15, 2012

Raj and Howard try to to figure out why Sheldon disappears at 2:45 every afternoon; jealousy arises in Penny and Leonard's relationship.

star 7.96
11,091 votes
Directors: Mark Cendrowski
Writers: Jim Reynolds, Steve Holland, Steven Molaro
The Tangerine Factor

#22 - The Tangerine Factor

Season 1 - Episode 17 - Aired May 19, 2008

Penny's break-up spurs Leonard to summon up the courage to ask her out, and each head to Sheldon for advice on their upcoming date.

star 7.96
11,960 votes
Directors: Mark Cendrowski
Writers: Lee Aronsohn, Steven Molaro
The Status Quo Combustion

#23 - The Status Quo Combustion

Season 7 - Episode 24 - Aired May 15, 2014

Faced with an uncertain future, Sheldon considers a major change; Emily and Raj decide to take things to the next level. Also, Howard and Bernadette struggle to care for Mrs. Wolowitz when she is injured.

star 7.96
8,363 votes
Directors: Mark Cendrowski
Writers: Steve Holland, Steven Molaro, Tara Hernandez
The Prestidigitation Approximation

#24 - The Prestidigitation Approximation

Season 4 - Episode 18 - Aired Mar 10, 2011

Sheldon is baffled by Wolowitz's magic trick. Meanwhile, Leonard realizes dating Priya may make it impossible to continue being friends with Penny.

star 7.96
13,100 votes
Directors: Mark Cendrowski
Writers: Chuck Lorre, Eric Kaplan, Steven Molaro
The Staircase Implementation

#25 - The Staircase Implementation

Season 3 - Episode 22 - Aired May 17, 2010

Leonard tells Penny about how he met Sheldon for the first time...and what happened to the elevator.

star 7.96
13,889 votes
Directors: Mark Cendrowski
Writers: Chuck Lorre, Dave Goetsch, Maria Ferrari