The BEST episodes of The Big Bang Theory season 3

Every episode of The Big Bang Theory season 3, ranked from best to worst by thousands of votes from fans of the show. The best episodes of The Big Bang Theory season 3!

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.

Last Updated: 4/14/2023Network:CBS
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The Pants Alternative
star
8.02
12755 votes

#1 - The Pants Alternative

Season 3 - Episode 18 - Aired 3/22/2010

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

Directors: Mark Cendrowski
Watch Now:AmazoniTunes
The Lunar Excitation
star
7.97
12851 votes

#2 - The Lunar Excitation

Season 3 - Episode 23 - Aired 5/24/2010

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

Directors: Peter Chakos
Watch Now:AmazoniTunes
The Staircase Implementation
star
7.95
13654 votes

#3 - The Staircase Implementation

Season 3 - Episode 22 - Aired 5/17/2010

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

Directors: Mark Cendrowski
Watch Now:AmazoniTunes
The Einstein Approximation
star
7.85
12508 votes

#4 - The Einstein Approximation

Season 3 - Episode 14 - Aired 2/1/2010

Sheldon's search for the answer to a physics problem leads him to work at the Cheesecake Factory with Penny.

Directors: Mark Cendrowski
Watch Now:AmazoniTunes
The Plimpton Stimulation
star
7.84
13221 votes

#5 - The Plimpton Stimulation

Season 3 - Episode 21 - Aired 5/10/2010

Leonard and Sheldon compete for the attention of a famous female physicist.

Directors: Mark Cendrowski
Watch Now:AmazoniTunes
The Adhesive Duck Deficiency
star
7.80
12438 votes

#6 - The Adhesive Duck Deficiency

Season 3 - Episode 8 - Aired 11/16/2009

With Leonard, Howard and Raj away camping in the desert, an injured Penny has only Sheldon to rely on.

Directors: Mark Cendrowski
Watch Now:AmazoniTunes
The Precious Fragmentation
star
7.76
12514 votes

#7 - The Precious Fragmentation

Season 3 - Episode 17 - Aired 3/8/2010

When the guys find a ring from "The Lord of the Rings" at a garage sale, it threatens to tear them apart.

Directors: Mark Cendrowski
Watch Now:iTunes
The Gorilla Experiment
star
7.76
12286 votes

#8 - The Gorilla Experiment

Season 3 - Episode 10 - Aired 12/7/2009

Penny gets help from Sheldon in order to understand what Leonard's work is, while Wolowitz develops a jealousy when Leonard starts hanging out with his new girlfriend.

Directors: Mark Cendrowski
Watch Now:iTunes
The Maternal Congruence
star
7.76
11824 votes

#9 - The Maternal Congruence

Season 3 - Episode 11 - Aired 12/14/2009

A Christmas visit from his mother has Leonard discovering she's kept a lot of news from him that she shares with Sheldon and worrying if she'll approve of his romance with Penny.

Directors: Mark Cendrowski
Watch Now:iTunes
The Psychic Vortex
star
7.76
12083 votes

#10 - The Psychic Vortex

Season 3 - Episode 12 - Aired 1/11/2010

Leonard is aghast to find out a secret of Penny's: she believes in psychics. Meanwhile, Sheldon tries to assist Koothrappali in picking up a girl at a university mixer.

Directors: Mark Cendrowski
Watch Now:iTunes
The Vengeance Formulation
star
7.76
12481 votes

#11 - The Vengeance Formulation

Season 3 - Episode 9 - Aired 11/23/2009

After he's humiliated on National Public Radio, Sheldon vows to destroy Kripke, while Wolowitz tries not to destroy his new relationship with Bernadette.

Directors: Mark Cendrowski
Watch Now:iTunes
The Excelsior Acquisition
star
7.75
12518 votes

#12 - The Excelsior Acquisition

Season 3 - Episode 16 - Aired 3/1/2010

Sheldon winds up in traffic court when he gets a ticket because of Penny.

Directors: Mark Cendrowski
Watch Now:iTunes
The Large Hadron Collision
star
7.75
11866 votes

#13 - The Large Hadron Collision

Season 3 - Episode 15 - Aired 2/8/2010

Leonard can only bring one guest on a trip to see CERN's Large Hadron Collider (the world's largest and highest energy particle accelerator) in Switzerland on Valentine's Day.

Directors: Mark Cendrowski
Watch Now:iTunes
The Creepy Candy Coating Corollary
star
7.68
12259 votes

#14 - The Creepy Candy Coating Corollary

Season 3 - Episode 5 - Aired 10/19/2009

After overhearing that Wil Wheaton is entering a trading-card competition, Sheldon decides to enter it himself. Meanwhile, Penny sets up one of her friends on a date with Wolowitz.

Directors: Mark Cendrowski
Watch Now:iTunes
The Electric Can Opener Fluctuation
star
7.68
13347 votes

#15 - The Electric Can Opener Fluctuation

Season 3 - Episode 1 - Aired 9/21/2009

When Sheldon learns the guys tampered with his expedition data he got from the arctic, he returns to Texas in disgrace. This results in the guys following him, which threatens Leonard's hope for some romantic time with Penny and the guys' friendship with Sheldon.

Directors: Mark Cendrowski
Watch Now:iTunes
The Spaghetti Catalyst
star
7.67
12877 votes

#16 - The Spaghetti Catalyst

Season 3 - Episode 20 - Aired 5/3/2010

When Leonard and Penny aren't speaking, Sheldon goes to extremes to keep them both happy.

Directors: Anthony Rich
Watch Now:iTunes
The Pirate Solution
star
7.67
12156 votes

#17 - The Pirate Solution

Season 3 - Episode 4 - Aired 10/12/2009

Raj must find a new job or be sent back to India, but Sheldon has a solution, which leaves Leonard and Penny dealing with Howard as a third wheel.

Directors: Mark Cendrowski
Watch Now:iTunes
The Bozeman Reaction
star
7.66
12361 votes

#18 - The Bozeman Reaction

Season 3 - Episode 13 - Aired 1/18/2010

When their apartment is robbed, Leonard and Sheldon turn to their friends to create a state-of-the-art security system.

Directors: Mark Cendrowski
Watch Now:iTunes
The Jiminy Conjecture
star
7.66
12473 votes

#19 - The Jiminy Conjecture

Season 3 - Episode 2 - Aired 9/28/2009

Leonard and Penny struggle to recover from an awkward first hookup while Sheldon and Howard stake their best comic books on a bet to determine the species of a cricket.

Directors: Mark Cendrowski
Writer: Jim Reynolds
Watch Now:iTunes
The Wheaton Recurrence
star
7.66
12571 votes

#20 - The Wheaton Recurrence

Season 3 - Episode 19 - Aired 4/12/2010

A fight between Leonard and Penny threatens their relationship, while Sheldon battles Wil Wheaton in bowling.

Directors: Mark Cendrowski
Watch Now:iTunes
The Gothowitz Deviation
star
7.65
12423 votes

#21 - The Gothowitz Deviation

Season 3 - Episode 3 - Aired 10/5/2009

Howard and Raj visit a Goth nightclub to pick up women while Sheldon attempts to build a better Penny using chocolate-based behavior modification.

Directors: Mark Cendrowski
Watch Now:iTunes
The Guitarist Amplification
star
7.58
12056 votes

#22 - The Guitarist Amplification

Season 3 - Episode 7 - Aired 11/9/2009

When Penny has an old friend staying over at her apartment, an argument ensues between her and Leonard, causing Sheldon to get caught between the couple.

Directors: Mark Cendrowski
Watch Now:iTunes
The Cornhusker Vortex
star
7.47
11777 votes

#23 - The Cornhusker Vortex

Season 3 - Episode 6 - Aired 11/2/2009

Sheldon becomes Leonard's teacher in order to understand football, while an incident with flying a kite threatens Howard and Raj's friendship.

Directors: Mark Cendrowski
Watch Now:iTunes

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