The Big Bang Theory Episodes

2007, TV Show

The Big Bang Theory Season 5 episodes

The Countdown Reflection Season 5, Episode 24

The fifth series ends with Howard and Bernadette deciding to get married before his NASA mission, causing the gang to scurry into overdrive in an effort to stage the wedding. NASA astronaut Mike Massimino has a cameo as himself. read more

The Launch Acceleration Season 5, Episode 23

When NASA reschedules the launch of Howard's mission, the countdown to his wedding with Bernadette is put on hold, leaving him to deal with an irate father of the bride. Meanwhile, Leonard's pillow talk with Penny leaves her steaming. read more

The Stag Convergence Season 5, Episode 22

Bernadette has second thoughts about marrying Howard when details of his sexual history emerge at his bachelor party. Wil Wheaton has a cameo as a party guest. read more

The Hawking Excitation Season 5, Episode 21

Sheldon is in seventh heaven and prepared to do whatever it takes to meet his science idol Stephen Hawking, who is working on a project with Howard. read more

The Transporter Malfunction Season 5, Episode 20

Raj may have found his soul mate after his parents set him up on a date. Meanwhile, Sheldon thinks he's going out of his mind when he begins hearing the voice of Spock (Leonard Nimoy) after he breaks Leonard's "Star Trek" collectible. read more

The Weekend Vortex Season 5, Episode 19

Sheldon opts to spend a weekend playing video games with the guys instead of attending a birthday party for Amy's aunt. read more

The Werewolf Transformation Season 5, Episode 18

After his barber is hospitalised, Sheldon undergoes a hair-raising change in lifestyle as his carefully planned daily routines are thrown for a loop. Meanwhile, Howard is up in the air about continuing his astronaut training. read more

The Rothman Disintegration Season 5, Episode 17

Sheldon and Kripke square off in a series of sports-related competitions to win a coveted corner office at the university. Meanwhile, Penny feels uncomfortable accepting a gift from Amy. read more

The Vacation Solution Season 5, Episode 16

Sheldon takes it easy by working with Amy at her neurobiology lab after the university orders him to take a vacation. Meanwhile, Howard gets worked up when Bernadette suggests they sign a prenuptial agreement. read more

The Friendship Contraction Season 5, Episode 15

The friendship contract is in danger of being nullified when Leonard tires of Sheldon's selfish ways; Howard spaces out over selecting an astronaut nickname for himself. read more

The Beta Test Initiation Season 5, Episode 14

Leonard and Penny give dating another try, while Raj begins a rather unorthodox relationship with the virtual assistant on his phone. read more

The Recombination Hypothesis Season 5, Episode 13

More than food appears to be on the menu when Leonard invites Penny to a romantic dinner for two. read more

The Shiny Trinket Maneuver Season 5, Episode 12

Sheldon hurts Amy's feelings, and Penny gives him advice on how to be a better boyfriend; and Howard comes to terms with the fact that Bernadette isn't fond of children. read more

The Speckerman Recurrence Season 5, Episode 11

Leonard confronts his fears when he's contacted by a bully who tormented him in high school. read more

The Flaming Spittoon Acquisition Season 5, Episode 10

Sheldon becomes jealous when Stuart from the comic-book store asks Amy out on a date, and Sheldon's forced to reconsider his relationship with Amy. read more

The Ornithophobia Diffusion Season 5, Episode 9

Leonard and Penny attempt to hang out alone; and Sheldon tries to overcome his fear of birds. read more

The Isolation Permutation Season 5, Episode 8

Amy's heart is broken when Penny and Bernadette shop for wedding dresses and don't invite her. read more

The Good Guy Fluctuation Season 5, Episode 7

Leonard feels threatened when a charming comic-book artist comes between him and Priya; and Sheldon is determined to scare his friends on Halloween. read more

The Rhinitis Revelation Season 5, Episode 6

Sheldon's mum visits, and he competes for her attention, which seems more focused on his friends. read more

The Russian Rocket Reaction Season 5, Episode 5

Leonard and Sheldon attend a party at the home of Sheldon's nemesis, Wil Wheaton (in a cameo along with Brent Spiner). read more

The Wiggly Finger Catalyst Season 5, Episode 4

Raj meets a woman with whom he's able to talk. read more

The Pulled Groin Extrapolation Season 5, Episode 3

Leonard is Amy's date for a wedding, giving Leonard a chance to get to know her better; and Howard and Bernadette spend a weekend with Mrs. Wolowitz. read more

The Infestation Hypothesis Season 5, Episode 2

Penny and Sheldon clash, and Amy is caught in the middle of their battle; and Leonard looks for ways to keep his long-distance romance with Priya alive. read more

The Skank Reflex Analysis Season 5, Episode 1

In the fifth-season opener, Penny hits a low point when she realizes what she's done by sleeping with Raj; and Sheldon becomes the leader of the paintball team. read more

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Premiered: September 24, 2007, on CBS
Rating: TV-PG
User Rating: (8,819 ratings)
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Premise: Two nerdy physicists share an apartment and an unlikely friendship with their beautiful neighbor with whom one of them is infatuated. Like the universe after the big bang, the show's popularity expanded, thanks to breakout star Jim Parsons, along with the chemistry among the friends and the developing romance between Leonard and Penny. The addition of Melissa Rauch and Mayim Bialik in later seasons also enhanced the stories and relationships of the leads.

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