The Big Bang Theory: Season 4

The Big Bang Theory: Season 4

Poster for The Big Bang Theory: Season 4

The sitcom is centered on five characters living in Pasadena, California: roommates Leonard Hofstadter and Sheldon Cooper; Penny, a waitress and aspiring actress who lives across the hall; and Leonard and Sheldon's equally geeky and socially awkward friends and co-workers, mechanical engineer Howard Wolowitz and astrophysicist Raj Koothrappali. The geekiness and intellect of the four guys is contrasted for comic effect with Penny's social skills and common sense.

2010Rating: TV-14United States of AmericaChuck Lorre Productions, Warner Bros. Television
Comedy

Streaming (2 Providers)

Episodes

EPISODE 4.20

The Herb Garden Germination

Sheldon and Amy decide to start several rumors about the... More others as a test. Meanwhile, Howard takes his relationship with Bernadette to even higher level.

EPISODE 4.9

The Boyfriend Complexity

Penny asks Leonard to lie to her father, while Howard,... More Raj and Bernadette pull an all-nighter at a telescope.

EPISODE 4.8

The 21-second Excitation

While the guys camp in line for a long-awaited movie... More screening, Penny and Bernadette invite Amy to her first slumber party.

EPISODE 4.7

The Apology Insufficiency

Sheldon's answers during an FBI interview put Wolowitz's security clearance... More in jeopardy.

EPISODE 4.6

The Irish Pub Formulation

Leonard keeps an affair a secret from Sheldon, Howard and... More Raj.

EPISODE 4.5

The Desperation Emanation

Leonard realizes he’s the only one without a girlfriend, while... More Sheldon wants to get rid of his.

EPISODE 4.4

The Hot Troll Deviation

An embarrassing secret of Wolowitz's comes to light, while Sheldon... More and Raj have a small war at work.

EPISODE 4.3

The Zazzy Substitution

The guys are concerned as Sheldon searches for an alternative... More to human companionship.

EPISODE 4.24

The Roommate Transmogrification

When Bernadette receives her PhD, Wolowitz feels emasculated. Raj and... More Leonard swap places and Penny does something she's regrets.

EPISODE 4.23

The Engagement Reaction

When Howard finally breaks the news to his mom that... More he's engaged to Bernadette, it lands her in the hospital.

EPISODE 4.22

The Wildebeest Implementation

Raj attempts to cure his social anxiety disorder while Penny... More uses Bernadette to spy on Leonard and his girlfriend.

EPISODE 4.21

The Agreement Dissection

When Leonard spends too much time in the shower with... More Priya, Sheldon charges Leonard with two violations of the roommate agreement. However, before he can get too far, Priya uses her skills as a lawyer to nullify the charges due to the agreement's vague wording, much to Sheldon's dismay. When the guys take advantage of Priya's skills in order to eat Greek food on pizza night, Sheldon goes to Penny, who invites him to a girls' night out with Amy and Bernadette, which Sheldon agrees to after Penny mentions that they may be talking trash about Priya. After the girls drink some cocktails, they decide to take Sheldon dancing, which Sheldon reluctantly goes along with. After dancing, Sheldon takes an intoxicated Amy back to her apartment and as well as talking about Priya, meets a monkey who is addicted to smoking cigarettes. Amy tells Sheldon not to give in to Priya's law skills, before kissing him and going to her bathroom to vomit.

EPISODE 4.1

The Robotic Manipulation

Penny tags along on Sheldon's first ever date; Wolowitz finds... More a new use for a robotic arm.

EPISODE 4.2

The Cruciferous Vegetable Amplification

Realizing he will not live long enough to download his... More consciousness into a robot body, Sheldon tries to extend his life span.

EPISODE 4.19

The Zarnecki Incursion

Sheldon's online-game account is hacked by Todd Zarnecki, who then... More proceeds to steal all his items prompting the guys to go on a quest to retrieve them. Penny, Bernadette and Amy discuss how Penny groomed Leonard to be willing to try various things and more adventurous boyfriend... for some other woman — Priya.

EPISODE 4.18

The Prestidigitation Approximation

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

EPISODE 4.17

The Toast Derivation

Sheldon becomes concerned when everybody begins to hang out at... More Raj's apartment and discovers Leonard is the center of the group.

EPISODE 4.16

The Cohabitation Formulation

As Wolowitz contemplates taking things with Bernadette to the next... More level, Leonard rekindles his relationship with Raj's sister.

EPISODE 4.15

The Benefactor Factor

A wealthy donor to the university makes Leonard consider how... More far he's willing to go for the sake of science.

EPISODE 4.14

The Thespian Catalyst

Hoping it will make him a better teacher, Sheldon has... More Penny give him acting lessons. Raj has fantasies about a friend's girlfriend.

EPISODE 4.13

The Love Car Displacement

Bernadette runs into her ex-boyfriend while attending a science event... More with Wolowitz.

EPISODE 4.12

The Bus Pants Utilization

Leonard's idea for a smartphone app derails his friendship with... More Sheldon.

EPISODE 4.11

The Justice League Recombination

The guys find a "super" use for Penny's new boyfriend,... More Zack, when they enter a costume contest as the Justice League.

EPISODE 4.10

The Alien Parasite Hypothesis

Amy finds she has sexual feelings for Penny's ex, while... More Koothrappali and Wolowitz try to prove who would be the better superhero.

The Big Bang Theory: Season 4 | Release Details

The Big Bang Theory: Season 4 is available to stream in New Zealand now on Netflix and Prime Video.