Amazon-Video Comedy Central Showtime Apple TV+ DC Universe Disney Plus YouTube Premium HBO Max Peacock source-3036 Netflix Vudu HBO Go Hulu Plus Amazon Prime CBS All Access Verizon

Join or Sign In

Sign in to customize your TV listings

Sign in with Facebook Sign in with email

By joining TV Guide, you agree to our Terms of Use and acknowledge the data practices in our Privacy Agreement.

The Big Bang Theory

Episodes

17 Episodes 2007 - 2008

In this sitcom, two nerdy scientists sharing an apartment find their lives disrupted when a beautiful young woman moves in next door. The first season introduces viewers to the main characters: Leonard Hofstadter (Johnny Galecki), a brilliant but awkward experimental physicist; Sheldon Cooper (Jim Parsons), an even more brilliant theoretical physicist who lacks any kind of social niceties or understanding of sarcasm and irony; and Penny (Kaley Cuoco),a young blonde aspiring actress who immediately catches Leonard's attention. Rounding out the group are Howard Wolowitz (Simon Helberg), an aerospace engineer who still lives with his mother; and Rajesh Koothrappali (Kunal Nayyar), an astrophysicist who's so shy around women that he's unable to speak to them without the aid of alcohol.

Episode 1

Pilot

Mon, Sep 24, 2007 30 mins

Leonard and Sheldon meet their beautiful new neighbour and invite her over for lunch, and Leonard begins to fall for her, even entertaining the idea that they could become a couple.

Where to Watch
The Big Bang Theory, Season 1 Episode 1 image

Episode 2

The Big Bran Hypothesis

Mon, Oct 1, 2007 30 mins

Leonard tells Penny he'll sign for a package for her, but when he asks for Sheldon's assistance, his plan goes terribly wrong.

Where to Watch
The Big Bang Theory, Season 1 Episode 2 image

Episode 3

The Fuzzy Boots Corollary

Mon, Oct 8, 2007 30 mins

With the encouragement of his friends, Leonard gathers his courage and asks a woman out on a date.

Where to Watch
The Big Bang Theory, Season 1 Episode 3 image

Episode 4

The Luminous Fish Effect

Mon, Oct 15, 2007 30 mins

Faced with a life without physics when he gets fired, Sheldon resorts to weaving ponchos, forcing a worried Leonard to call Sheldon's mother for help.

Where to Watch
The Big Bang Theory, Season 1 Episode 4 image

Episode 5

The Hamburger Postulate

Mon, Oct 22, 2007 30 mins

Leonard has a one-night stand with fellow scientist Leslie Winkle

Where to Watch
The Big Bang Theory, Season 1 Episode 5 image

Episode 6

The Middle Earth Paradigm

Mon, Oct 29, 2007 30 mins

Leonard and Sheldon and their friends attend Penny's Halloween party.

Where to Watch
The Big Bang Theory, Season 1 Episode 6 image

Episode 7

The Dumpling Paradox

Mon, Nov 5, 2007 30 mins

Penny temporarily sleeps on Leonard and Sheldon's couch when Wolowitz romances her friend and the lovers take over Penny's apartment. The guys find a big void in their activities without Wolowitz, and even ask Penny to join their video-game team.

Where to Watch
The Big Bang Theory, Season 1 Episode 7 image

Episode 8

The Grasshopper Experiment

Mon, Nov 12, 2007 30 mins

Koothrappali is overwhelmed when his parents arrange a blind date for him, but after a few drinks he discovers he can actually talk to women. Unfortunately, his gorgeous date is more interested in Sheldon.

Where to Watch
The Big Bang Theory, Season 1 Episode 8 image

Episode 9

The Cooper-Hofstadter Polarization

Mon, Mar 17, 2008 30 mins

Sheldon and Leonard are asked to a physics conference to present their work together, but that leads to a feud because Sheldon's too arrogant to share the honour. Penny does her best to mediate, but only makes things worse.

Where to Watch
The Big Bang Theory, Season 1 Episode 9 image

Episode 10

The Loobenfeld Decay

Mon, Mar 24, 2008 30 mins

Leonard lies to Penny to avoid hearing her sing a second time, but Sheldon extends the lie, which makes things worse, including Sheldon producing a nonexistent cousin.

Where to Watch
The Big Bang Theory, Season 1 Episode 10 image

Episode 11

The Pancake Batter Anomaly

Mon, Mar 31, 2008 30 mins

Sheldon gets sick, but the guys refuse to take care of him because he's such a bad patient, which leaves an unsuspecting Penny to nurse him back to health.

Where to Watch
The Big Bang Theory, Season 1 Episode 11 image

Episode 12

The Jerusalem Duality

Mon, Apr 14, 2008 30 mins

Sheldon becomes jealous of a 15-year-old physics prodigy, so he and Leonard come up with a plan to sabotage the young man's research.

Where to Watch
The Big Bang Theory, Season 1 Episode 12 image

Episode 13

The Bat Jar Conjecture

Mon, Apr 21, 2008 30 mins

The men compete in the university's lighthearted physics bowl, but Sheldon's much-too-serious attitude forces them to replace him with his nemesis, Leslie Winkle.

Where to Watch
The Big Bang Theory, Season 1 Episode 13 image

Episode 14

The Nerdvana Annihilation

Mon, Apr 28, 2008 30 mins

The guys buy a time-machine prop from a '60s movie and Penny ridicules their preoccupation with toys, which forces Leonard to reexamine his life and maturity. Mike: Andrew Walker.

Where to Watch
The Big Bang Theory, Season 1 Episode 14 image

Episode 15

The Pork Chop Indeterminancy

Mon, May 5, 2008 30 mins

The friends all fall for Sheldon's sister and Leonard comes up with a plan to get rid of his rivals, but Sheldon announces that he will decide whom his sister dates. Missy: Courtney Henggeler.

Where to Watch
The Big Bang Theory, Season 1 Episode 15 image

Episode 16

The Peanut Reaction

Mon, May 12, 2008 30 mins

Penny's plans for a surprise birthday party for Leonard, who doesn't usually mark the occasion, get thrown off-kilter when Sheldon gets a chance to live out one of his biggest dreams. Althea: Vernee Watson. Jan: Judith Moreland. Dan: Ronald Hunter. Stan: Chuck Carter.

Where to Watch
The Big Bang Theory, Season 1 Episode 16 image

Episode 17

The Tangerine Factor

Mon, May 19, 2008 30 mins

In the first-season finale, Leonard asks Penny out on a date after she breaks up with her boyfriend. To prepare for the big night, Leonard practices the date the day before with the guys.

Where to Watch
The Big Bang Theory, Season 1 Episode 17 image