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The Worst Episodes of The Big Bang Theory

Every episode of The Big Bang Theory ranked from worst to best. Explore the Worst Episodes of The Big Bang Theory!

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Physicists Leonard and Sheldon find their nerd-centric social circle with pals Howard and Raj expanding when aspiring actress Penny moves in next door.

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Episode Rankings

  1. #1 Worst Episode
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    The Big Bang Theory Season 12 Episode 19 - The Inspiration Deprivation
    6.5/10(33 votes)

    #1 - The Inspiration Deprivation

    S12:E19

    The concept of what it would mean for women everywhere if Amy were to win a Nobel Prize causes Amy to have a meltdown. Also, Howard and Raj try to relive the good old days after Howard buys a scooter that looks like the one he had years ago.

    Director:Mark Cendrowski
    Writer:Unknown

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  2. The Big Bang Theory Season 12 Episode 17 - The Conference Valuation
    6.6/10(39 votes)

    #2 - The Conference Valuation

    S12:E17

    When Penny and Bernadette go to San Diego for a pharmaceutical sales convention, Wolowitz is in charge of the kids. Also, Sheldon finds a book on experimenting on kids, and the guys plus Amy make a day of it.

    Director:Mark Cendrowski
    Writer:Unknown

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  3. The Big Bang Theory Season 12 Episode 20 - The Decision Reverberation
    6.6/10(38 votes)

    #3 - The Decision Reverberation

    S12:E20

    Raj is worried people won’t take him seriously in his own field after publishing a paper that suggests he may have discovered alien life. Also, Leonard wants to be the principal investigator on a plasma physics study.

    Director:Mark Cendrowski
    Writer:Unknown

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  4. The Big Bang Theory Season 10 Episode 16 - The Allowance Evaporation
    6.7/10(46 votes)

    #4 - The Allowance Evaporation

    S10:E16

    Sheldon and Amy have their first fight since moving in together, and Koothrappali is shocked at the realities of financial independence when he stops receiving support from his father.

    Director:Mark Cendrowski
    Writer:Unknown

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  5. The Big Bang Theory Season 10 Episode 22 - The Cognition Regeneration
    6.7/10(43 votes)

    #5 - The Cognition Regeneration

    S10:E22

    Leonard isn’t thrilled when Penny considers taking a new job offered by her ex-boyfriend, Zack.

    Director:Mark Cendrowski
    Writer:Unknown

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  6. The Big Bang Theory Season 11 Episode 17 - The Athenaeum Allocation
    6.7/10(43 votes)

    #6 - The Athenaeum Allocation

    S11:E17

    Leonard jumps through hoops to help secure the perfect wedding venue for Sheldon and Amy. Also, Bernadette and Howard have a hard time deciding who should stay at home with the kids and who should go back to work.

    Director:Mark Cendrowski
    Writer:Unknown

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  7. The Big Bang Theory Season 12 Episode 5 - The Planetarium Collision
    6.7/10(39 votes)

    #7 - The Planetarium Collision

    S12:E5

    When Amy doesn’t have time to work on super-asymmetry, Sheldon goes to great lengths to ensure she’s available to work with him even it if means accidentally sabotaging her career in the process. Raj doesn’t want Howard to join him in hosting a show at the planetarium.

    Director:Mark Cendrowski
    Writer:Unknown

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  8. The Big Bang Theory Season 12 Episode 12 - The Propagation Proposition
    6.7/10(38 votes)

    #8 - The Propagation Proposition

    S12:E12

    Penny runs into her ex-boyfriend, Zack, who invites her and Leonard to a dinner to meet his newlywed wife. After the dinner the newlywed couple make an odd proposition to Leonard, which makes Penny to freak out. Also, Raj attempts to mend things with his ex-fiancée, Anu.

    Director:Mark Cendrowski
    Writer:Unknown

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  9. The Big Bang Theory Season 12 Episode 13 - The Confirmation Polarization
    6.7/10(36 votes)

    #9 - The Confirmation Polarization

    S12:E13

    Sheldon and Amy are thrilled when their super asymmetry theory is proven by two physicists, until they try to kick Amy off the Nobel nomination. Also, Bernadette gets one of her drugs approved at work and wants a reluctant Penny to head the sales team.

    Director:Mark Cendrowski
    Writer:Unknown

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  10. The Big Bang Theory Season 12 Episode 14 - The Meteorite Manifestation
    6.7/10(38 votes)

    #10 - The Meteorite Manifestation

    S12:E14

    Sheldon is thrilled to help Bernadette and Wolowitz navigate bureaucratic paperwork, until he discovers they are breaking the law. Also, Leonard is disappointed when his friends exclude him from a scientific project.

    Director:Mark Cendrowski
    Writer:Unknown

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  11. The Big Bang Theory Season 10 Episode 2 - The Military Miniaturization
    6.8/10(55 votes)

    #11 - The Military Miniaturization

    S10:E2

    Colonel Williams, an Air Force representative from the Department of Material Command sits down to talk with Wolowitz.

    Director:Mark Cendrowski
    Writer:Unknown

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  12. The Big Bang Theory Season 10 Episode 13 - The Romance Recalibration
    6.8/10(48 votes)

    #12 - The Romance Recalibration

    S10:E13

    When Penny feels that Leonard is taking her for granted, she decides to go on a spa weekend with Amy. Also, Wolowitz and Koothrappali try to fix a squeaky floorboard in the baby’s room.

    Director:Mark Cendrowski
    Writer:Unknown

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  13. The Big Bang Theory Season 11 Episode 14 - The Separation Triangulation
    6.8/10(41 votes)

    #13 - The Separation Triangulation

    S11:E14

    Raj finds himself in the middle of domestic drama when he learns the woman he's dating, has a very upset husband. Also, when Sheldon rents his old room back for a quiet place to work, he drives Leonard crazy by being a model tenant.

    Director:Mark Cendrowski
    Writer:Unknown

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  14. The Big Bang Theory Season 12 Episode 15 - The Donation Oscillation
    6.8/10(40 votes)

    #14 - The Donation Oscillation

    S12:E15

    Penny tries to seduce an abstaining Leonard to ruin his "donation" for her ex-boyfriend, Zack, and his wife, Marissa. Also, Wolowitz, Bernadette, Anu and Koothrappali turn Koothrappali's canceled bachelor party into a couple's trip.

    Director:Mark Cendrowski
    Writer:Unknown

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  15. The Big Bang Theory Season 5 Episode 16 - The Vacation Solution
    6.9/10(45 votes)

    #15 - The Vacation Solution

    S5:E16

    When Sheldon is forced to take his vacation, he goes to work with Amy in her neurobiology lab.

    Director:Mark Cendrowski
    Writer:Unknown

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  16. The Big Bang Theory Season 10 Episode 1 - The Conjugal Conjecture
    6.9/10(67 votes)

    #16 - The Conjugal Conjecture

    S10:E1

    After Sheldon’s mother and Leonard's father share an evening together, everyone deals with an awkward morning the next day. Also, Penny’s family arrives for the wedding ceremony, including her anxiety-ridden mother, Susan, and her drug dealing brother, Randall.

    Director:Mark Cendrowski
    Writer:Unknown

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  17. The Big Bang Theory Season 10 Episode 3 - The Dependence Transcendence
    6.9/10(52 votes)

    #17 - The Dependence Transcendence

    S10:E3

    Tensions rise when the boys struggle to complete their government project on time and Sheldon tries an energy drink to stay awake. Also, Penny and Amy go to a “party” at Bert the geologist’s house, and Koothrappali learns Bernadette’s true feelings about her pregnancy when they clean out the future baby room.

    Director:Mark Cendrowski
    Writer:Unknown

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  18. The Big Bang Theory Season 10 Episode 14 - The Emotion Detection Automation
    6.9/10(48 votes)

    #18 - The Emotion Detection Automation

    S10:E14

    Sheldon beta-tests an MIT invention after hearing it can help him read people’s emotions. Also, Leonard can’t hide his feelings when Penny announces her brother is coming to town, and Raj invites his ex-girlfriends over to give him dating advice.

    Director:Mark Cendrowski
    Writer:Unknown

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  19. The Big Bang Theory Season 10 Episode 18 - The Escape Hatch Identification
    6.9/10(47 votes)

    #19 - The Escape Hatch Identification

    S10:E18

    When Raj moves out of his apartment, Leonard and Penny offer him Sheldon's old room.

    Director:Mark Cendrowski
    Writer:Unknown

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  20. The Big Bang Theory Season 10 Episode 20 - The Recollection Dissipation
    6.9/10(46 votes)

    #20 - The Recollection Dissipation

    S10:E20

    Sheldon pushes himself to the limit when he collaborates on projects with Leonard and Wolowitz as well as Amy on the same day. Also, Bernadette is nearing the end of her maternity leave and must return to work.

    Director:Mark Cendrowski
    Writer:Unknown

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  21. The Big Bang Theory Season 10 Episode 21 - The Separation Agitation
    6.9/10(45 votes)

    #21 - The Separation Agitation

    S10:E21

    Howard and Bernadette have a hard time leaving Halley in day care when Bernadette returns to work. Also, Bert introduces the gang to his new girlfriend, Rebecca.

    Director:Mark Cendrowski
    Writer:Unknown

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  22. The Big Bang Theory Season 11 Episode 3 - The Relaxation Integration
    6.9/10(44 votes)

    #22 - The Relaxation Integration

    S11:E3

    Sheldon and Amy struggle with picking a wedding date, which stresses out Sheldon and causes him talking in his sleep. Meanwhile, Raj and Stuart fight over the attention of one of Bernadette's co-workers.

    Director:Mark Cendrowski
    Writer:Unknown

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  23. The Big Bang Theory Season 11 Episode 11 - The Celebration Reverberation
    6.9/10(44 votes)

    #23 - The Celebration Reverberation

    S11:E11

    Raj and Howard's feud continues as the gang plan Halley's first birthday party. Sheldon's surprise for Amy's birthday goes awry when they get food poisoning. Also, Leonard gets a Christmas letter from his brother that causes him to spiral out about his own lack of accomplishments.

    Director:Mark Cendrowski
    Writer:Unknown

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  24. The Big Bang Theory Season 11 Episode 16 - The Neonatal Nomenclature
    6.9/10(43 votes)

    #24 - The Neonatal Nomenclature

    S11:E16

    When Bernadette won't go into labor, the gang tries different tactics to get things started. Also, Howard confronts Bernadette after Amy accidentally reveals she's already chosen their son's name.

    Director:Gay Linvill
    Writer:Unknown

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  25. The Big Bang Theory Season 11 Episode 18 - The Gates Excitation
    6.9/10(46 votes)

    #25 - The Gates Excitation

    S11:E18

    Bill Gates visits Penny's work, and the gang schemes to meet him. Hilarity ensues. Meanwhile, Sheldon is convinced that he's a target of an April's Fools prank.

    Director:Mark Cendrowski
    Writer:Unknown

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Worst Episodes Summary

"The Inspiration Deprivation" is the worst rated episode of "The Big Bang Theory". It scored 6.5/10 based on 33 votes. Directed by Mark Cendrowski and written by Unknown, it aired on 4/18/2019. This episode scored 0.1 points lower than the second lowest rated, "The Conference Valuation".