All Episodes of The Big Bang Theory (2007-2019)
by jahnerikroos | created - 17 Jul 2021 | updated - 05 Oct 2022 | PublicMy average rating of Season 01: 6,65
My average rating of Season 02: 5,96
My average rating of Season 03: 5,78
My average rating of Season 04: 5,63
My average rating of Season 05: 5,46
My average rating of Season 06: 5,58
My average rating of Season 07: 5,63
My average rating of Season 08: 5,79
My average rating of Season 09: 5,42
My average rating of Season 10: 5,21
My average rating of Season 11: 5,29
My average rating of Season 12: 5,46
My average rating all episodes: 5,63
Lowest rated episode: 4, Highest rated episode: 9
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1.
The Big Bang Theory (2007–2019)
Episode:
Unaired Pilot
(2006)
TV-PG | 23 min | Comedy, Romance
The first Pilot of what will become "The Big Bang Theory". Leonard and Sheldon are two awkward scientists who share an apartment. They meet a drunk girl called Katie and invite her to stay ... See full summary »
Director: James Burrows | Stars: Iris Bahr, Johnny Galecki, Jim Parsons, Amanda Walsh
Votes: 2,323
S00E01
2.
The Big Bang Theory (2007–2019)
Episode:
Pilot
(2007)
TV-PG | 23 min | Comedy, Romance
A pair of socially awkward theoretical physicists meet their new neighbor Penny, who is their polar opposite.
Director: James Burrows | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 7,189
S01E01
3.
The Big Bang Theory (2007–2019)
Episode:
The Big Bran Hypothesis
(2007)
TV-PG | 21 min | Comedy, Romance
Penny is furious with Leonard and Sheldon when they sneak into her apartment and clean it while she is sleeping.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 5,803
S01E02
4.
The Big Bang Theory (2007–2019)
Episode:
The Fuzzy Boots Corollary
(2007)
TV-PG | 22 min | Comedy, Romance
Leonard gets upset when he discovers that Penny is seeing a new guy, so he tries to trick her into going on a date with him.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 5,198
S01E03
5.
The Big Bang Theory (2007–2019)
Episode:
The Luminous Fish Effect
(2007)
TV-PG | 21 min | Comedy, Romance
Sheldon's mother is called to intervene when he delves into numerous obsessions after being fired for being disrespectful to his new boss.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 5,242
S01E04
6.
The Big Bang Theory (2007–2019)
Episode:
The Hamburger Postulate
(2007)
TV-PG | 21 min | Comedy, Romance
Leslie seduces Leonard, but afterwards tells him that she is only interested in a one-night stand.
Director: Andrew D. Weyman | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,988
S01E05
7.
The Big Bang Theory (2007–2019)
Episode:
The Middle Earth Paradigm
(2007)
TV-PG | 21 min | Comedy, Romance
The guys are invited to Penny's Halloween party, where Leonard has yet another run-in with Penny's ex-boyfriend Kurt.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 5,185
S01E06
8.
The Big Bang Theory (2007–2019)
Episode:
The Dumpling Paradox
(2007)
TV-PG | 21 min | Comedy, Romance
When Howard hooks up with Penny's old friend, his absence in the gang causes problems for the rest of the guys.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,903
S01E07
9.
The Big Bang Theory (2007–2019)
Episode:
The Grasshopper Experiment
(2007)
TV-PG | 21 min | Comedy, Romance
When Raj's parents set him up on a blind date, he finds he can talk to women with the aid of alcohol.
Director: Ted Wass | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,931
S01E08
10.
The Big Bang Theory (2007–2019)
Episode:
The Cooper-Hofstadter Polarization
(2008)
TV-PG | 20 min | Comedy, Romance
Leonard and Sheldon's friendship is put to the test when Leonard wants to present a paper they co-authored at a physics convention, but Sheldon doesn't.
Director: Joel Murray | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,748
S01E09
11.
The Big Bang Theory (2007–2019)
Episode:
The Loobenfeld Decay
(2008)
TV-PG | 21 min | Comedy, Romance
Leonard lies to Penny so he and Sheldon can get out of watching her perform, but Sheldon believes that the lie has too many loose ends, so he comes up with a new, unnecessarily complex one to replace it.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,877
S01E10
12.
The Big Bang Theory (2007–2019)
Episode:
The Pancake Batter Anomaly
(2008)
TV-PG | 22 min | Comedy, Romance
When Sheldon gets sick, Leonard, Howard and Raj go AWOL, leaving a reluctant Penny to deal with him.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,845
S01E11
13.
The Big Bang Theory (2007–2019)
Episode:
The Jerusalem Duality
(2008)
TV-PG | 20 min | Comedy, Romance
Sheldon decides to give up his work and focus on other tasks when a 15-year-old prodigy joins the university, so the other guys come up with a plan to get rid of him.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,597
S01E12
14.
The Big Bang Theory (2007–2019)
Episode:
The Bat Jar Conjecture
(2008)
TV-PG | 22 min | Comedy, Romance
Sheldon becomes so intent on demonstrating his intellectual superiority over the other guys that they kick him off the Physics Bowl team and replace him with his nemesis, Leslie.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,736
S01E13
15.
The Big Bang Theory (2007–2019)
Episode:
The Nerdvana Annihilation
(2008)
TV-PG | 20 min | Comedy, Romance
Penny gets mad at the guys when their full scale model of a time machine causes her to miss work, which prompts Leonard to give up all of his nerd memorabilia.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,663
S01E14
16.
The Big Bang Theory (2007–2019)
Episode:
The Pork Chop Indeterminacy
(2008)
TV-PG | 22 min | Comedy, Romance
Leonard, Howard and Raj fight over Sheldon's twin sister when she arrives in town. Raj takes part in a drug trial to suppress his selective mutism.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,886
S01E15
17.
The Big Bang Theory (2007–2019)
Episode:
The Peanut Reaction
(2008)
TV-PG | 20 min | Comedy, Romance
When Penny learns that Leonard has never had a birthday party, she and the rest of the guys plan a surprise party for him.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,602
S01E16
18.
The Big Bang Theory (2007–2019)
Episode:
The Tangerine Factor
(2008)
TV-PG | 20 min | Comedy, Romance
After a bad breakup, Penny finally agrees to go out on a date with Leonard, however they both develop doubts and turn to Sheldon for advice.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,821
S01E17
19.
The Big Bang Theory (2007–2019)
Episode:
The Bad Fish Paradigm
(2008)
TV-PG | 22 min | Comedy, Romance
Leonard becomes concerned when his date with Penny ends abruptly and she starts blowing him off. When told the truth, Sheldon would rather move out than keep Penny's reasons a secret from Leonard.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,688
S02E01
20.
The Big Bang Theory (2007–2019)
Episode:
The Codpiece Topology
(2008)
TV-PG | 21 min | Comedy, Romance
Sheldon is annoyed when Leonard turns to Leslie for comfort after seeing Penny with another guy.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,331
S02E02
21.
The Big Bang Theory (2007–2019)
Episode:
The Barbarian Sublimation
(2008)
TV-PG | 21 min | Comedy, Romance
Sheldon introduces Penny to online gaming, however she refuses to quit after becoming addicted.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 5,046
S02E03
22.
The Big Bang Theory (2007–2019)
Episode:
The Griffin Equivalency
(2008)
TV-PG | 21 min | Comedy, Romance
The guys struggle to cope with Raj's arrogance after he is featured in a People magazine article.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,371
S02E04
23.
The Big Bang Theory (2007–2019)
Episode:
The Euclid Alternative
(2008)
TV-PG | 20 min | Comedy, Romance
Sheldon annoys the gang when Leonard can't drive him to and from work, so they try to teach him how to drive.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,483
S02E05
24.
The Big Bang Theory (2007–2019)
Episode:
The Cooper-Nowitzki Theorem
(2008)
TV-PG | 21 min | Comedy, Romance
Sheldon is flattered when a graduate student takes a shine to him, however her extreme devotion becomes too much to handle.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,510
S02E06
25.
The Big Bang Theory (2007–2019)
Episode:
The Panty Piñata Polarization
(2008)
TV-PG | 21 min | Comedy, Romance
Penny plans revenge when Sheldon bans her from his and Leonard's apartment, while Howard and Raj use the latest technology to try to find the house being used in "America's Next Top Model."
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,784
S02E07
26.
The Big Bang Theory (2007–2019)
Episode:
The Lizard-Spock Expansion
(2008)
TV-PG | 20 min | Comedy, Romance
Leonard and Howard's friendship is jeopardised when Leonard steals a girl from Howard.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,300
S02E08
27.
The Big Bang Theory (2007–2019)
Episode:
The White Asparagus Triangulation
(2008)
TV-PG | 21 min | Comedy, Romance
Sheldon believes that Leonard will wreck his relationship with Stephanie, so he decides to take matters into his own hands.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,258
S02E09
28.
The Big Bang Theory (2007–2019)
Episode:
The Vartabedian Conundrum
(2008)
TV-PG | 21 min | Comedy, Romance
Leonard tries to slow down his relationship with Stephanie when he realizes that they are living together, while Sheldon becomes convinced that he has an untraceable disease.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,173
S02E10
29.
The Big Bang Theory (2007–2019)
Episode:
The Bath Item Gift Hypothesis
(2008)
TV-PG | 21 min | Comedy, Romance
Leonard is disappointed when Penny develops an interest in an attractive physicist at the university. Meanwhile, Sheldon struggles to find an appropriate Christmas gift for Penny.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 7,016
S02E11
30.
The Big Bang Theory (2007–2019)
Episode:
The Killer Robot Instability
(2009)
TV-PG | 21 min | Comedy, Romance
Howard becomes depressed after Penny makes a cruel statement about his love life, while the rest of the guys prepare for a grudge killer robot duel against an obnoxious colleague at the university.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,215
S02E12
31.
The Big Bang Theory (2007–2019)
Episode:
The Friendship Algorithm
(2009)
TV-PG | 21 min | Comedy, Romance
Sheldon tries to make friends with Kripke in the hope that it will get him access to a coveted computer at the university.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,186
S02E13
32.
The Big Bang Theory (2007–2019)
Episode:
The Financial Permeability
(2009)
TV-PG | 21 min | Comedy, Romance
Leonard and Sheldon try to help out Penny when she can't afford to pay her rent.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,147
S02E14
33.
The Big Bang Theory (2007–2019)
Episode:
The Maternal Capacitance
(2009)
TV-PG | 21 min | Comedy, Romance
Sheldon hits it off with Leonard's psychoanalyst mother, but she drives Leonard and Penny to the bottle.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 5,001
S02E15
34.
The Big Bang Theory (2007–2019)
Episode:
The Cushion Saturation
(2009)
TV-PG | 21 min | Comedy, Romance
Howard hooks up with Leslie, while Penny accidentally ruins Sheldon's spot on the couch.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,162
S02E16
35.
The Big Bang Theory (2007–2019)
Episode:
The Terminator Decoupling
(2009)
TV-PG | 21 min | Comedy, Romance
On a train to San Francisco, Howard, Raj and Leonard fight for the affections of sci-fi star Summer Glau, while Sheldon is forced to turn to Penny for help when he leaves his flash drive behind.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,506
S02E17
36.
The Big Bang Theory (2007–2019)
Episode:
The Work Song Nanocluster
(2009)
TV-PG | 20 min | Comedy, Romance
Sheldon's assistance with Penny's home-based business leads to chaos.
Director: Peter Chakos | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,185
S02E18
37.
The Big Bang Theory (2007–2019)
Episode:
The Dead Hooker Juxtaposition
(2009)
TV-PG | 21 min | Comedy, Romance
Penny becomes jealous when a gorgeous new neighbor attracts the guys' attention.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,220
S02E19
38.
The Big Bang Theory (2007–2019)
Episode:
The Hofstadter Isotope
(2009)
TV-PG | 20 min | Comedy, Romance
Leonard is upset when the owner of the comic book store goes on a date with Penny, so he convinces Howard and Raj to take him to a bar so that he can pick up a woman of his own.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,048
S02E20
39.
The Big Bang Theory (2007–2019)
Episode:
The Vegas Renormalization
(2009)
TV-PG | 21 min | Comedy, Romance
After being dumped by Leslie, Howard heads to Las Vegas with Leonard and Raj. Meanwhile, Penny is forced to take in Sheldon after he locks himself out of his apartment.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,385
S02E21
40.
The Big Bang Theory (2007–2019)
Episode:
The Classified Materials Turbulence
(2009)
TV-PG | 19 min | Comedy, Romance
Penny's second date with Stuart has significant implications for Leonard. Howard enlists the guys' help with one of his NASA projects.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,007
S02E22
41.
The Big Bang Theory (2007–2019)
Episode:
The Monopolar Expedition
(2009)
TV-PG | 21 min | Comedy, Romance
Penny gets upset when she finds out Leonard and the guys plan to work at the North Pole for the summer.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,136
S02E23
42.
The Big Bang Theory (2007–2019)
Episode:
The Electric Can Opener Fluctuation
(2009)
TV-14 | 21 min | Comedy, Romance
After returning from the North Pole, a conflict among the guys sends Sheldon back to Texas and interferes with Leonard's reunion with Penny.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,417
S03E01
43.
The Big Bang Theory (2007–2019)
Episode:
The Jiminy Conjecture
(2009)
TV-PG | 21 min | Comedy, Romance
Leonard and Penny's first night together goes awkwardly. Sheldon and Howard wager on the species of a cricket.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,042
S03E02
44.
The Big Bang Theory (2007–2019)
Episode:
The Gothowitz Deviation
(2009)
TV-PG | 20 min | Comedy, Romance
Sheldon attempts to covertly alter Penny's habits, while Howard and Raj try their luck meeting women at a Goth-style club.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,141
S03E03
45.
The Big Bang Theory (2007–2019)
Episode:
The Pirate Solution
(2009)
TV-PG | 30 min | Comedy, Romance
When Raj has to find a new job or be sent back to India, Sheldon's solution leaves Leonard and Penny dealing with Howard as the third wheel.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,050
S03E04
46.
The Big Bang Theory (2007–2019)
Episode:
The Creepy Candy Coating Corollary
(2009)
TV-PG | 20 min | Comedy, Romance
Leonard is forced to ask Penny to set Howard up with one of her friends, while Sheldon seeks payback against sci-fi star Wil Wheaton.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,160
S03E05
47.
The Big Bang Theory (2007–2019)
Episode:
The Cornhusker Vortex
(2009)
TV-PG | 20 min | Comedy, Romance
Leonard tries to learn about football to fit in with Penny's friends. Meanwhile, a loss in a kite war threatens to end Raj and Howard's friendship.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,911
S03E06
48.
The Big Bang Theory (2007–2019)
Episode:
The Guitarist Amplification
(2009)
TV-PG | 20 min | Comedy, Romance
Sheldon is caught in the middle when Leonard and Penny argue about Penny's friend staying at her apartment.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,932
S03E07
49.
The Big Bang Theory (2007–2019)
Episode:
The Adhesive Duck Deficiency
(2009)
TV-PG | 21 min | Comedy, Romance
Penny is forced to turn to Sheldon for help when she dislocates her shoulder in the bathtub. Meanwhile, the rest of the guys accidentally get stoned in the desert while waiting for a meteor shower.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 5,559
S03E08
50.
The Big Bang Theory (2007–2019)
Episode:
The Vengeance Formulation
(2009)
TV-PG | 19 min | Comedy, Romance
Sheldon plans revenge after Kripke humiliates him on the radio. Howard develops doubts about his relationship with Bernadette.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,131
S03E09
51.
The Big Bang Theory (2007–2019)
Episode:
The Gorilla Experiment
(2009)
TV-PG | 21 min | Comedy, Romance
Sheldon attempts to help Penny understand physics to impress Leonard, while Howard becomes jealous when Bernadette takes an interest in Leonard's research.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,199
S03E10
52.
The Big Bang Theory (2007–2019)
Episode:
The Maternal Congruence
(2009)
TV-PG | 20 min | Comedy, Romance
Leonard's mother makes a visit to his dismay and Sheldon's delight.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,091
S03E11
53.
The Big Bang Theory (2007–2019)
Episode:
The Psychic Vortex
(2010)
Not Rated | 20 min | Comedy, Romance
Raj talks Sheldon into being his wingman at a university mixer. Leonard has trouble dealing with Penny consulting a psychic.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,021
S03E12
54.
The Big Bang Theory (2007–2019)
Episode:
The Bozeman Reaction
(2010)
TV-PG | 20 min | Comedy, Romance
When their apartment is robbed, Leonard and Sheldon turn to Howard and Raj to create a state-of-the-art security system.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,920
S03E13
55.
The Big Bang Theory (2007–2019)
Episode:
The Einstein Approximation
(2010)
TV-PG | 20 min | Comedy, Romance
Sheldon wreaks havoc when he is stumped by a difficult physics question.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,271
S03E14
56.
The Big Bang Theory (2007–2019)
Episode:
The Large Hadron Collision
(2010)
TV-PG | 21 min | Comedy, Romance
When Leonard is offered a trip to Switzerland on Valentine's Day to visit the CERN laboratory, Sheldon uses any and all means to be his guest instead of Penny.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,857
S03E15
57.
The Big Bang Theory (2007–2019)
Episode:
The Excelsior Acquisition
(2010)
TV-PG | 21 min | Comedy, Romance
Sheldon misses an opportunity to get Stan Lee's autograph because he has to make an appearance in traffic court.
Director: Peter Chakos | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,962
S03E16
58.
The Big Bang Theory (2007–2019)
Episode:
The Precious Fragmentation
(2010)
TV-PG | 20 min | Comedy, Romance
The guys' friendship is threatened when they find a ring from the "Lord of the Rings" trilogy.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,196
S03E17
59.
The Big Bang Theory (2007–2019)
Episode:
The Pants Alternative
(2010)
TV-PG | 21 min | Comedy, Romance
Sheldon seeks help from the rest of the gang in overcoming his fear of public speaking when he receives an award.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,125
S03E18
60.
The Big Bang Theory (2007–2019)
Episode:
The Wheaton Recurrence
(2010)
TV-PG | 21 min | Comedy, Romance
Sheldon takes on Wil Wheaton in a game of bowling. Leonard and Penny's relationship comes to a crossroad.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,852
S03E19
61.
The Big Bang Theory (2007–2019)
Episode:
The Spaghetti Catalyst
(2010)
TV-PG | 20 min | Comedy, Romance
Sheldon is forced to go behind Leonard's back to spend time with Penny following their breakup.
Director: Anthony Rich | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,851
S03E20
62.
The Big Bang Theory (2007–2019)
Episode:
The Plimpton Stimulation
(2010)
TV-PG | 21 min | Comedy, Romance
Chaos ensues when a nymphomaniac physicist visiting Sheldon hooks up with Leonard.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,119
S03E21
63.
The Big Bang Theory (2007–2019)
Episode:
The Staircase Implementation
(2010)
TV-PG | 20 min | Comedy, Romance
Leonard tells Penny about how he and Sheldon became roommates and what happened to the elevator.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 5,361
S03E22
64.
The Big Bang Theory (2007–2019)
Episode:
The Lunar Excitation
(2010)
TV-PG | 20 min | Comedy, Romance
Penny has a night of angry, drunken sex with Leonard, much to his confusion. Meanwhile, Howard and Raj search for Sheldon's perfect match online.
Director: Peter Chakos | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,212
S03E23
65.
The Big Bang Theory (2007–2019)
Episode:
The Robotic Manipulation
(2010)
TV-PG | 21 min | Comedy, Romance
Penny ends up tagging along on Sheldon's first ever date with Amy, while Howard finds an unusual use for a robotic arm.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,692
S04E01
66.
The Big Bang Theory (2007–2019)
Episode:
The Cruciferous Vegetable Amplification
(2010)
TV-PG | 21 min | Comedy, Romance
When Sheldon calculates the technology to download his consciousness into a robot won't be invented soon enough, he desperately tries to find a way to increase his lifespan.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,196
S04E02
67.
The Big Bang Theory (2007–2019)
Episode:
The Zazzy Substitution
(2010)
TV-PG | 21 min | Comedy, Romance
Following his 'breakup' with Amy, the gang become concerned with Sheldon's obsessive search for non-human companionship and call his mother to intervene.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,958
S04E03
68.
The Big Bang Theory (2007–2019)
Episode:
The Hot Troll Deviation
(2010)
TV-PG | 20 min | Comedy, Romance
Howard tries to get Penny's help in winning back Bernadette, but first has to confess the embarrassing reason why they broke up in the first place. Raj and Sheldon clash over a desk.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,948
S04E04
69.
The Big Bang Theory (2007–2019)
Episode:
The Desperation Emanation
(2010)
TV-PG | 21 min | Comedy, Romance
Sheldon is scared that he is in a relationship when Amy asks him to meet her mother, and Leonard asks Howard and Bernadette to set him up because he is the only person in the group without a girlfriend.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,787
S04E05
70.
The Big Bang Theory (2007–2019)
Episode:
The Irish Pub Formulation
(2010)
TV-PG | 25 min | Comedy, Romance
Leonard tries to keep everyone from finding out that he spent the night with Raj's sister, but Sheldon finds out and concocts an elaborate story to help him keep the secret from Raj.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,859
S04E06
71.
The Big Bang Theory (2007–2019)
Episode:
The Apology Insufficiency
(2010)
TV-PG | 21 min | Comedy, Romance
An FBI agent interviews the guys when Howard needs to obtain a security clearance.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,889
S04E07
72.
The Big Bang Theory (2007–2019)
Episode:
The 21-Second Excitation
(2010)
TV-PG | 19 min | Comedy, Romance
The guys camp out all night waiting to see an extended cut of Indiana Jones, while Amy joins in on girls' night with Penny and Bernadette.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,898
S04E08
73.
The Big Bang Theory (2007–2019)
Episode:
The Boyfriend Complexity
(2010)
TV-PG | 21 min | Comedy, Romance
Penny asks Leonard to pose as her boyfriend when her father visits. Howard, Raj and Bernadette have an awkward encounter when they spend the evening together.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,076
S04E09
74.
The Big Bang Theory (2007–2019)
Episode:
The Alien Parasite Hypothesis
(2010)
TV-PG | 20 min | Comedy, Romance
Amy finds she has sexual feelings for Penny's ex-boyfriend Zack, while Raj and Howard try to prove who would be the better superhero.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,766
S04E10
75.
The Big Bang Theory (2007–2019)
Episode:
The Justice League Recombination
(2010)
TV-PG | 20 min | Comedy, Romance
The guys enter a costume contest as members of the Justice League and convince Penny and Zack to join them.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,338
S04E11
76.
The Big Bang Theory (2007–2019)
Episode:
The Bus Pants Utilization
(2011)
TV-PG | 21 min | Comedy, Romance
Leonard has an idea for a new smartphone app and asks the guys for help, however Sheldon tries to take over the project, and Leonard fires him.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,766
S04E12
77.
The Big Bang Theory (2007–2019)
Episode:
The Love Car Displacement
(2011)
TV-PG | 21 min | Comedy, Romance
Chaos ensues when the gang spend the weekend together at a science convention.
Director: Anthony Rich | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,052
S04E13
78.
The Big Bang Theory (2007–2019)
Episode:
The Thespian Catalyst
(2011)
TV-PG | 21 min | Comedy, Romance
To improve his skills as an instructor, Sheldon asks Penny to give him acting lessons. Meanwhile, Raj begins having impure fantasies about Bernadette.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,830
S04E14
79.
The Big Bang Theory (2007–2019)
Episode:
The Benefactor Factor
(2011)
TV-PG | 20 min | Comedy, Romance
To secure needed funding for the university, Sheldon convinces Leonard to get friendly with a wealthy benefactor.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,776
S04E15
80.
The Big Bang Theory (2007–2019)
Episode:
The Cohabitation Formulation
(2011)
TV-PG | 21 min | Comedy, Romance
Bernadette makes Howard choose between herself and his mother, while Penny and Raj become upset when Priya returns to town and resumes her relationship with Leonard.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,660
S04E16
81.
The Big Bang Theory (2007–2019)
Episode:
The Toast Derivation
(2011)
TV-PG | 22 min | Comedy, Romance
Sheldon becomes concerned when everybody begins to hang out at Raj's apartment and discovers Leonard is the center of the group.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,691
S04E17
82.
The Big Bang Theory (2007–2019)
Episode:
The Prestidigitation Approximation
(2011)
TV-PG | 21 min | Comedy, Romance
Priya forces Leonard to choose between a relationship with her or a friendship with Penny. A magic trick by Howard has Sheldon fooled.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,872
S04E18
83.
The Big Bang Theory (2007–2019)
Episode:
The Zarnecki Incursion
(2011)
TV-PG | 23 min | Comedy, Romance
The guys go all out to help Sheldon find the person responsible for hacking his online gaming account, while the girls' hatred for Priya increases.
Director: Peter Chakos | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,761
S04E19
84.
The Big Bang Theory (2007–2019)
Episode:
The Herb Garden Germination
(2011)
TV-PG | 21 min | Comedy, Romance
Sheldon and Amy secretly experiment on the gang by spreading rumors when they hear that Bernadette is thinking about breaking up with Howard.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,745
S04E20
85.
The Big Bang Theory (2007–2019)
Episode:
The Agreement Dissection
(2011)
TV-PG | 21 min | Comedy, Romance
When Priya finds a loophole in the roommate agreement to throw Sheldon out for the night, Penny, Amy and Bernadette take him to a nightclub.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,840
S04E21
86.
The Big Bang Theory (2007–2019)
Episode:
The Wildebeest Implementation
(2011)
TV-PG | 21 min | Comedy, Romance
Sheldon invents a three-player chess game, Penny and Amy use Bernadette to spy on Leonard and Priya, and Raj tries a new drug to treat his social anxiety.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,634
S04E22
87.
The Big Bang Theory (2007–2019)
Episode:
The Engagement Reaction
(2011)
TV-PG | 20 min | Comedy, Romance
Howard believes that his mom suffered a heart attack because he told her that he's marrying Bernadette, Sheldon freaks out over germs, and Penny and Priya compare notes on Leonard.
Director: Howard Murray | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,703
S04E23
88.
The Big Bang Theory (2007–2019)
Episode:
The Roommate Transmogrification
(2011)
TV-PG | 22 min | Comedy, Romance
Raj moves in with Sheldon after hearing Leonard and Priya engage in a Star Trek fantasy in his apartment. Bernadette receives her doctorate.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,949
S04E24
89.
The Big Bang Theory (2007–2019)
Episode:
The Skank Reflex Analysis
(2011)
TV-PG | 22 min | Comedy, Romance
The gang deal with the fallout from Penny and Raj's night together.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,341
S05E01
90.
The Big Bang Theory (2007–2019)
Episode:
The Infestation Hypothesis
(2011)
TV-PG | 20 min | Comedy, Romance
Amy gets inadvertently caught in the middle of a fight between Sheldon and Penny over a chair. Leonard tries to add some spice to his long-distance relationship with Priya.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,871
S05E02
91.
The Big Bang Theory (2007–2019)
Episode:
The Pulled Groin Extrapolation
(2011)
TV-PG | 20 min | Comedy, Romance
Leonard accompanies Amy to a colleague's wedding. Howard tries to convince Bernadette to live with his mother after they get married.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,706
S05E03
92.
The Big Bang Theory (2007–2019)
Episode:
The Wiggly Finger Catalyst
(2011)
TV-PG | 20 min | Comedy, Romance
Penny sets up Raj with a deaf friend, not knowing that she's actually a gold digger, and Sheldon decides to let his minor decisions rest on the roll of the dice.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,770
S05E04
93.
The Big Bang Theory (2007–2019)
Episode:
The Russian Rocket Reaction
(2011)
TV-PG | 22 min | Comedy, Romance
Sheldon takes offense when Leonard wants to attend a party with Wil Wheaton, while Bernadette tries to block Howard's opportunity to go into outer space.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,727
S05E05
94.
The Big Bang Theory (2007–2019)
Episode:
The Rhinitis Revelation
(2011)
TV-PG | 22 min | Comedy, Romance
Sheldon gets upset when his mother comes to visit but refuses to cook for him and attend physics lectures.
Director: Howard Murray | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,671
S05E06
95.
The Big Bang Theory (2007–2019)
Episode:
The Good Guy Fluctuation
(2011)
TV-PG | 20 min | Comedy, Romance
Sheldon tries to get into the spirit of Halloween by trying to scare the guys after they prank him. Leonard seeks Penny's advice when an attractive comic book artist takes an interest in him.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 4,479
S05E07
96.
The Big Bang Theory (2007–2019)
Episode:
The Isolation Permutation
(2011)
TV-PG | 21 min | Comedy, Romance
Amy is hurt when Penny and Bernadette go bridesmaid dress shopping without her, so she turns to a reluctant Sheldon for comfort.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,653
S05E08
97.
The Big Bang Theory (2007–2019)
Episode:
The Ornithophobia Diffusion
(2011)
TV-PG | 21 min | Comedy, Romance
Sheldon tries to overcome his fear of birds, while Leonard and Penny attempt to hang out together strictly as friends.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,838
S05E09
98.
The Big Bang Theory (2007–2019)
Episode:
The Flaming Spittoon Acquisition
(2011)
TV-PG | 21 min | Comedy, Romance
When Stuart asks Amy on a date, Sheldon considers having a more serious relationship with her. Meanwhile, the guys become obsessed with a new card game involving Wild West heroes and witches.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,691
S05E10
99.
The Big Bang Theory (2007–2019)
Episode:
The Speckerman Recurrence
(2011)
TV-PG | 20 min | Comedy, Romance
Leonard confronts the man who bullied him in high school, while Penny realizes she did her fair share of tormenting in the past.
Director: Anthony Rich | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,667
S05E11
100.
The Big Bang Theory (2007–2019)
Episode:
The Shiny Trinket Maneuver
(2012)
TV-PG | 21 min | Comedy, Romance
Penny helps Sheldon work on his relationship with Amy when he trivializes one of her accomplishments. Howard is irked by Bernadette's dislike of children.
Director: Mark Cendrowski | Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
Votes: 3,657
S05E12
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