The BEST episodes of The Big Bang Theory season 5
Every episode of The Big Bang Theory season 5, ranked from best to worst by thousands of votes from fans of the show. The best episodes of The Big Bang Theory season 5!
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.
#1 - The Good Guy Fluctuation
Season 5 - Episode 7 - Aired 10/27/2011
A cute comic book artist puts Leonard and Priya’s relationship to the test, while Sheldon tries to scare the guys for Halloween.
#2 - The Countdown Reflection
Season 5 - Episode 24 - Aired 5/10/2012
As Howard's mission to space approaches, Howard and Bernadette decide to get married before his launch, causing the gang to scurry into overdrive in an effort to stage the wedding.
#3 - The Hawking Excitation
Season 5 - Episode 21 - Aired 4/5/2012
When Wolowitz gets to work with Stephen Hawking, Sheldon is willing to do anything to meet his hero.
#4 - The Beta Test Initiation
Season 5 - Episode 14 - Aired 1/26/2012
Leonard and Penny deal with the idea of starting a relationship again and Raj finally finds a "woman" he can talk to without being drunk. Meanwhile, Sheldon decides to start a YouTube series entitled "Sheldon Cooper presents Fun with Flags" with the help of Amy.
#5 - The Launch Acceleration
Season 5 - Episode 23 - Aired 5/3/2012
When NASA moves up Howard's mission, he must face his fears and Bernadette's dad, thus putting the wedding plans in jeopardy. Meanwhile, Leonard says something surprising to Penny in the bedroom.
#6 - The Werewolf Transformation
Season 5 - Episode 18 - Aired 2/23/2012
Sheldon becomes agitated when his regular barber is out sick. Astronaut training causes Howard to reconsider wanting to go into space. Penny beats Leonard in chess, the first time she plays.
#7 - The Weekend Vortex
Season 5 - Episode 19 - Aired 3/8/2012
Sheldon must choose between joining Amy at her aunt's birthday party or playing videogames all weekend with the guys.
#8 - The Recombination Hypothesis
Season 5 - Episode 13 - Aired 1/19/2012
Leonard, who broke up with Priya, asks Penny out to a spur-of the-moment romantic dinner for two, and the duo contemplates resuming their relationship.
#9 - The Stag Convergence
Season 5 - Episode 22 - Aired 4/26/2012
After the guys throw Howard a bachelor party, Bernadette reconsiders marrying him after learning about his sexual history.
#10 - The Russian Rocket Reaction
Season 5 - Episode 5 - Aired 10/13/2011
Sheldon and Leonard get invited to a party at Wil Wheaton's house, and Howard gets an out-of-this-world opportunity.
#11 - The Flaming Spittoon Acquisition
Season 5 - Episode 10 - Aired 11/17/2011
Sheldon considers taking his relationship with Amy to the next level when Stuart from the comic book store asks her out on a date.
#12 - The Infestation Hypothesis
Season 5 - Episode 2 - Aired 9/22/2011
A fight between Sheldon and Penny leaves Amy caught in the middle. Meanwhile, Leonard tries to spice up his long-distance relationship with Priya.
#13 - The Wiggly Finger Catalyst
Season 5 - Episode 4 - Aired 10/6/2011
Penny plays Matchmaker for Raj, which results in him finding a girl he is comfortable talking to, but the gang suspects that she may be taking advantage of Raj.
#14 - The Pulled Groin Extrapolation
Season 5 - Episode 3 - Aired 9/29/2011
Leonard and Amy get to know each other better when Amy invites Leonard to a wedding. Meanwhile, Howard and Bernadette spend the weekend with Mrs. Wolowitz.
#15 - The Transporter Malfunction
Season 5 - Episode 20 - Aired 3/29/2012
Penny buys Leonard and Sheldon “Star Trek” collectibles as a thank-you, leading Sheldon to be haunted by Mr. Spock. Meanwhile, Raj decides he has met the “Future Mrs. Koothrappali” after his parents set him up on a date.
#16 - The Rothman Disintegration
Season 5 - Episode 17 - Aired 2/16/2012
Sheldon and his rival Barry Kripke fight it out over the availability of a new office. Penny gets a gift from Amy that really tests their friendship and it doesn't end well.
#17 - The Ornithophobia Diffusion
Season 5 - Episode 9 - Aired 11/10/2011
Leonard and Penny try hanging out as friends on a 'non-date,' but end up purposely ruining each others chances with perspective dates. Meanwhile, Sheldon enlists the help of Bernadette and Amy to overcome his fear of birds.
#18 - The Friendship Contraction
Season 5 - Episode 15 - Aired 2/2/2012
Sheldon's selfish demands force Leonard to reconsider their friendship. Meanwhile, Wolowitz tries to pick his astronaut nickname.
#19 - The Skank Reflex Analysis
Season 5 - Episode 1 - Aired 9/22/2011
Penny is worried with how damaged her friendship with the guys will be in the aftermath of her sleeping with Raj, while Sheldon becomes the leader of the paintball team.
#20 - The Shiny Trinket Maneuver
Season 5 - Episode 12 - Aired 1/12/2012
Sheldon gets in trouble with Amy when he isn't impressed by her recent accomplishment, and Howard must come to grips with Bernadette's dislike of children.
#21 - The Vacation Solution
Season 5 - Episode 16 - Aired 2/9/2012
When Sheldon is forced to take his vacation, he goes to work with Amy in her neurobiology lab. Also, Bernadette wants Howard to sign a pre-nup.
#22 - The Rhinitis Revelation
Season 5 - Episode 6 - Aired 10/20/2011
Sheldon's mother, Mary Cooper, comes to visit, but Sheldon is annoyed that she also spends time with the rest of the gang, instead of catering to his every demand.
#23 - The Isolation Permutation
Season 5 - Episode 8 - Aired 11/3/2011
Amy becomes heartbroken when she discovers that Penny and Bernadette went wedding dress shopping without her and turns to a reluctant Sheldon for comfort.
#24 - The Speckerman Recurrence
Season 5 - Episode 11 - Aired 12/8/2011
When Leonard's former high school tormentor resurfaces, Leonard must confront him. Meanwhile, Penny realizes she did her fair share of tormenting in the past.