The Big Bang Theory backdrop
Comedy

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!

Binge this in 3d 22h•Peaking at 9.5/10

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

Airs on
CBS
BestEpisodes
WorstEpisodes
BestSeasons
AllEpisodes

Seasons12

All123456789101112

Episode Rankings

  1. #1 Worst Episode
    Click to reveal
    The Big Bang Theory Season 9 Episode 1 - The Matrimonial Momentum
    6.8/10(4508 votes)

    #1 - The Matrimonial Momentum

    S9:E1

    After driving to Vegas to get married, Penny struggles with Leonard’s confession that he kissed another girl. Also, Sheldon doesn't know how to act after Amy pushes pause on their relationship.

    Director:Mark Cendrowski
    Writer:Unknown

    Be the first to start the conversation for this episode

  2. The Big Bang Theory Season 10 Episode 22 - The Cognition Regeneration
    6.8/10(3074 votes)

    #2 - 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

    Be the first to start the conversation for this episode

  3. The Big Bang Theory Season 11 Episode 17 - The Athenaeum Allocation
    6.8/10(2935 votes)

    #3 - 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

    Be the first to start the conversation for this episode

  4. The Big Bang Theory Season 12 Episode 5 - The Planetarium Collision
    6.8/10(3057 votes)

    #4 - 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

    Be the first to start the conversation for this episode

  5. The Big Bang Theory Season 10 Episode 13 - The Romance Recalibration
    6.9/10(3258 votes)

    #5 - 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

    Be the first to start the conversation for this episode

  6. The Big Bang Theory Season 8 Episode 3 - The First Pitch Insufficiency
    7.0/10(4154 votes)

    #6 - The First Pitch Insufficiency

    S8:E3

    Wolowitz feels nervous when he is asked to throw the first pitch at a Los Angeles Angels game. Penny and Leonard want to prove Sheldon wrong after he says he and Amy are the better couple.

    Director:Mark Cendrowski
    Writer:Unknown

    Be the first to start the conversation for this episode

    7. Trending NowTRENDING NOW

    The 20 BEST Episodes of The Big Bang Theory

    READ
  7. The Big Bang Theory Season 8 Episode 10 - The Champagne Reflection
    7.0/10(3884 votes)

    #7 - The Champagne Reflection

    S8:E10

    While Sheldon says a tearful goodbye to the final installment of "Fun with Flags", Leonard, Howard and Raj search for something significant in a dead professor's research. And Bernadette finds out what her colleagues really think of her.

    Director:Mark Cendrowski
    Writer:Unknown

    Be the first to start the conversation for this episode

  8. The Big Bang Theory Season 8 Episode 21 - The Communication Deterioration
    7.0/10(3522 votes)

    #8 - The Communication Deterioration

    S8:E21

    When Raj is asked to create a message in case a NASA mission discovers alien life, the guys fight over what he should do. Also, Penny is torn between auditioning for a movie or keeping her successful pharmaceutical sales job.

    Director:Mark Cendrowski
    Writer:Unknown

    Be the first to start the conversation for this episode

  9. The Big Bang Theory Season 11 Episode 3 - The Relaxation Integration
    7.0/10(3170 votes)

    #9 - 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

    Be the first to start the conversation for this episode

  10. The Big Bang Theory Season 12 Episode 4 - The Tam Turbulence
    7.0/10(3055 votes)

    #10 - The Tam Turbulence

    S12:E4

    When Sheldon won't tell anyone why he's never mentioned his childhood best friend, Leonard takes matters into his own hands. Bernadette and Penny take out Raj’s fiancée for dinner to get the skinny on her.

    Director:Mark Cendrowski
    Writer:Unknown

    Be the first to start the conversation for this episode

  11. The Big Bang Theory Season 12 Episode 19 - The Inspiration Deprivation
    7.0/10(2938 votes)

    #11 - 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

    Be the first to start the conversation for this episode

  12. The Big Bang Theory Season 10 Episode 16 - The Allowance Evaporation
    7.1/10(3065 votes)

    #12 - 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

    Be the first to start the conversation for this episode

  13. The Big Bang Theory Season 10 Episode 18 - The Escape Hatch Identification
    7.1/10(3063 votes)

    #13 - 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

    Be the first to start the conversation for this episode

  14. The Big Bang Theory Season 10 Episode 19 - The Collaboration Fluctuation
    7.1/10(3111 votes)

    #14 - The Collaboration Fluctuation

    S10:E19

    Leonard, Penny and Raj adjust to their new living arrangement, and Sheldon takes an interest in Amy’s work.

    Director:Mark Cendrowski
    Writer:Unknown

    Be the first to start the conversation for this episode

  15. The Big Bang Theory Season 11 Episode 4 - The Explosion Implosion
    7.1/10(3104 votes)

    #15 - The Explosion Implosion

    S11:E4

    As Howard worries about fatherhood, he and Sheldon bond when they jointly assemble a model rocket. Meanwhile, Penny bonds with Leonard's mother, Beverly, much to his concern.

    Director:Mark Cendrowski
    Writer:Unknown

    Be the first to start the conversation for this episode

  16. The Big Bang Theory Season 11 Episode 8 - The Tesla Recoil
    7.1/10(3019 votes)

    #16 - The Tesla Recoil

    S11:E8

    Leonard and Howard are furious after they learn Sheldon went to work with the military behind their backs. Also, while Bernadette is on bed rest, she asks Raj to do some digging when she suspects that Ruchi might be trying to take over her projects at work.

    Director:Anthony Rich
    Writer:Unknown

    Be the first to start the conversation for this episode

  17. The Big Bang Theory Season 11 Episode 11 - The Celebration Reverberation
    7.1/10(2978 votes)

    #17 - 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

    Be the first to start the conversation for this episode

  18. The Big Bang Theory Season 11 Episode 16 - The Neonatal Nomenclature
    7.1/10(2917 votes)

    #18 - 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

    Be the first to start the conversation for this episode

  19. The Big Bang Theory Season 11 Episode 18 - The Gates Excitation
    7.1/10(2980 votes)

    #19 - 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

    Be the first to start the conversation for this episode

  20. The Big Bang Theory Season 12 Episode 12 - The Propagation Proposition
    7.1/10(2924 votes)

    #20 - 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

    Be the first to start the conversation for this episode

  21. The Big Bang Theory Season 12 Episode 13 - The Confirmation Polarization
    7.1/10(2945 votes)

    #21 - 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

    Be the first to start the conversation for this episode

  22. The Big Bang Theory Season 12 Episode 14 - The Meteorite Manifestation
    7.1/10(2933 votes)

    #22 - 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

    Be the first to start the conversation for this episode

  23. The Big Bang Theory Season 12 Episode 17 - The Conference Valuation
    7.1/10(2923 votes)

    #23 - 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

    Be the first to start the conversation for this episode

  24. The Big Bang Theory Season 12 Episode 18 - The Laureate Accumulation
    7.1/10(2890 votes)

    #24 - The Laureate Accumulation

    S12:E18

    When competitors Pemberton and Campbell charm America on a publicity tour, Sheldon and Amy try to bring Nobel laureates Kip Thorne, George Smoot and Frances Arnold to their side. Also, Halley's fear of the dark causes opportunity and conflict at the Wolowitz home.

    Director:Mark Cendrowski
    Writer:Unknown

    Be the first to start the conversation for this episode

  25. The Big Bang Theory Season 12 Episode 20 - The Decision Reverberation
    7.1/10(2884 votes)

    #25 - 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

    Be the first to start the conversation for this episode

Worst Episodes Summary

"The Matrimonial Momentum" is the worst rated episode of "The Big Bang Theory". It scored 6.8/10 based on 4508 votes. Directed by Mark Cendrowski and written by Unknown, it aired on 9/21/2015. This episode scored 0.0 points lower than the second lowest rated, "The Cognition Regeneration".