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The Best Episodes of The Big Bang Theory

Every episode of The Big Bang Theory ranked from best to worst. Let's dive into the Best Episodes of The Big Bang Theory!

The Best Episodes of The Big Bang Theory

Physicists Leonard and Sheldon find their nerd-centric social circle with pals Howard and Raj expanding when aspiring actress Penny moves in next door.
  1. Background image for Unraveling the Mystery: A Big Bang Farewell
    9.5/10(11.4k votes)

    #1 - Unraveling the Mystery: A Big Bang Farewell

    S12:E24

    Johnny Galecki and Kaley Cuoco will lead fans on a trip down memory lane, sharing some of the best-kept backstage secrets and personal memories from the past 12 years.

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    Director:Unknown
    Writer:Unknown
  2. Background image for The Bath Item Gift Hypothesis
    9.1/10(7.6k votes)

    #2 - The Bath Item Gift Hypothesis

    S2:E11

    Penny starts dating Leonard's handsome colleague; Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.

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    Writer:Unknown
  3. Background image for The Staircase Implementation
    9.0/10(5.8k votes)

    #3 - The Staircase Implementation

    S3:E22

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

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    Writer:Unknown
  4. Background image for The Opening Night Excitation
    9.0/10(5.8k votes)

    #4 - The Opening Night Excitation

    S9:E11

    After more than five years of dating, Sheldon and Amy spend their first night together. Also, Leonard, Wolowitz, and Koothrappali must decide who will take their extra Star Wars movie ticket.

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    Writer:Unknown
  5. Background image for The Bow Tie Asymmetry
    9.0/10(4.7k votes)

    #5 - The Bow Tie Asymmetry

    S11:E24

    When Amy's parents and Sheldon's family arrive, everybody is focused to make sure all wedding arrangements go according to plan – everyone except the bride and groom.

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    Writer:Unknown
  6. Background image for The Change Constant / The Stockholm Syndrome
    9.0/10(5.5k votes)

    #6 - The Change Constant / The Stockholm Syndrome

    S12:E23

    Sheldon and Amy await big news. Meanwhile, Penny and Leonard have some big news of their own. Also, Howard and Bernadette face the stressful challenge of leaving their kids for the first time and Raj makes a new friend, as the gang travels together into an uncharted future.

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    Writer:Unknown
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    The 20 WORST Episodes of The Big Bang Theory

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  8. Background image for The Adhesive Duck Deficiency
    8.9/10(6.1k votes)

    #7 - The Adhesive Duck Deficiency

    S3:E8

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

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    Writer:Unknown
  9. Background image for The Maternal Capacitance
    8.8/10(5.5k votes)

    #8 - The Maternal Capacitance

    S2:E15

    Leonard and Penny are drawn together after a disastrous visit from Leonard's mother.

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    Writer:Unknown
  10. Background image for The Thanksgiving Decoupling
    8.8/10(5.2k votes)

    #9 - The Thanksgiving Decoupling

    S7:E9

    Sheldon protests when the gang drags him to Mrs. Wolowitz’s house for Thanksgiving. Meanwhile, Penny and Leonard must deal with a mistake from her past.

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    Writer:Unknown
  11. Background image for The Barbarian Sublimation
    8.7/10(5.5k votes)

    #10 - The Barbarian Sublimation

    S2:E3

    Sheldon creates a monster when he introduces Penny to online gaming.

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    Writer:Unknown
  12. Background image for The Robotic Manipulation
    8.7/10(5.1k votes)

    #11 - The Robotic Manipulation

    S4:E1

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

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    Writer:Unknown
  13. Background image for The Scavenger Vortex
    8.7/10(5.1k votes)

    #12 - The Scavenger Vortex

    S7:E3

    When the entire gang competes in a scavenger hunt designed by Raj, it brings out the best - and worst - in everyone.

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    Writer:Unknown
  14. Background image for The Panty Piñata Polarization
    8.6/10(5.2k votes)

    #13 - The Panty Piñata Polarization

    S2:E7

    When Sheldon bans Penny from the apartment for numerous minor infractions, she decides to retaliate.

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    Writer:Unknown
  15. Background image for The Lunar Excitation
    8.6/10(4.6k votes)

    #14 - The Lunar Excitation

    S3:E23

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

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    Director:Peter Chakos
    Writer:Unknown
  16. Background image for The Justice League Recombination
    8.6/10(4.7k votes)

    #15 - The Justice League Recombination

    S4:E11

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

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    Writer:Unknown
  17. Background image for The Tangerine Factor
    8.5/10(5.3k votes)

    #16 - The Tangerine Factor

    S1:E17

    Penny's break-up spurs Leonard to summon the courage to ask her out, and each goes to Sheldon for advice on their upcoming date.

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    Writer:Unknown
  18. Background image for The Roommate Transmogrification
    8.5/10(4.3k votes)

    #17 - The Roommate Transmogrification

    S4:E24

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

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    Writer:Unknown
  19. Background image for The Good Guy Fluctuation
    8.5/10(4.8k votes)

    #18 - The Good Guy Fluctuation

    S5:E7

    A cute comic book artist puts Leonard and Priya’s relationship to the test, while Sheldon tries to scare the guys for Halloween.

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    Writer:Unknown
  20. Background image for The Hawking Excitation
    8.5/10(4.5k votes)

    #19 - The Hawking Excitation

    S5:E21

    When Wolowitz gets to work with Stephen Hawking, Sheldon is willing to do anything to meet his hero.

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    Writer:Unknown
  21. Background image for The Countdown Reflection
    8.5/10(4.4k votes)

    #20 - The Countdown Reflection

    S5:E24

    The fifth season 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.

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    Writer:Unknown
  22. Background image for The Long Distance Dissonance
    8.5/10(3.8k votes)

    #21 - The Long Distance Dissonance

    S10:E24

    The gang is concerned when Sheldon’s former admirer, Dr. Ramona Nowitzki, resurfaces while Amy is away at Princeton.

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    Writer:Unknown
  23. Background image for The Vegas Renormalization
    8.4/10(4.8k votes)

    #22 - The Vegas Renormalization

    S2:E21

    Leonard and Koothrappali escort a heartbroken Wolowitz to Las Vegas, and Sheldon becomes locked out of his apartment and must stay with Penny.

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    Writer:Unknown
  24. Background image for The Gorilla Experiment
    8.4/10(4.6k votes)

    #23 - The Gorilla Experiment

    S3:E10

    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.

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    Writer:Unknown
  25. Background image for The Einstein Approximation
    8.4/10(4.7k votes)

    #24 - The Einstein Approximation

    S3:E14

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

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    Writer:Unknown
  26. Background image for The Precious Fragmentation
    8.4/10(4.6k votes)

    #25 - The Precious Fragmentation

    S3:E17

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

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    Writer:Unknown

Best Episodes Summary

"Unraveling the Mystery: A Big Bang Farewell" is the best rated episode of "The Big Bang Theory". It scored 9.5/10 based on 11433 votes. Directed by Unknown and written by Unknown, it aired on 5/16/2019. This episode scored 0.4 points higher than the second highest rated, "The Bath Item Gift Hypothesis".