Recap / The Big Bang Theory

The Big Bang Theory is a sitcom series created by Chuck Lorre and Bill Prady. The series revolves around the lives of a group of Pasadena nerds who come across a girl next door, resulting in many hijinks ensuing. The series ran on CBS from 2007 to 2019.

Unmarked spoilers are present throughout the subpages. Read at your own risk.

Season 1

Smart is the new sexy.

Physicists Leonard and Sheldon understand everything from the inescapable gravitational pull of a black hole to the intricate structure of the atom. But take those atoms and assemble them into a woman, and their comprehension comes to a grinding halt. And when Penny, a woman with all those atoms in all the right places, moves in across the hall, Leonard and Sheldon's universe begins to expand in ways they never could have imagined.

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1. "Pilot"
2. "The Big Bran Hypothesis"
3. "The Fuzzy Boots Corollary"
4. "The Luminous Fish Effect"
5. "The Hamburger Postulate"
6. "The Middle-Earth Paradigm"
7. "The Dumpling Paradox"
8. "The Grasshopper Experiment"
9. "The Cooper-Hofstadter Polarization"
10. "The Loobenfeld Decay"
11. "The Pancake Batter Anomaly"
12. "The Jerusalem Duality"
13. "The Bat Jar Conjecture"
14. "The Nerdvana Annihilation"
15. "The Pork Chop Indeterminacy"
16. "The Peanut Reaction"
17. "The Tangerine Factor"

Season 2

Leonard gets a girl. So does Sheldon (Sheldon?!). Howard drives the Mars Rover into a ditch. Raj woos a terminator. Gorgeous girl- next-door Penny falls under the spell of Age of Conan. And super-smart, über confident Leslie Winkler reduces mere men to spineless jellyfish.

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1. "The Bad Fish Paradigm"
2. "The Codpiece Topology"
3. "The Barbarian Sublimation"
4. "The Griffin Equivalency"
5. "The Euclid Alternative"
6. "The Cooper-Nowitzki Theorem"
7. "The Panty Pinata Polarization"
8. "The Lizard-Spock Expansion"
9. "The White Asparagus Triangulation"
10. "The Vartabedian Conundrum"
11. "The Bath Item Gift Hypothesis"
12. "The Killer Robot Instability"
13. "The Friendship Algorithm"
14. "The Financial Permeability"
15. "The Maternal Capacitance"
16. "The Cushion Saturation"
17. "The Terminator Decoupling"
18. "The Work Song Nanocluster"
19. "The Dead Hooker Juxtaposition"
20. "The Hofstadter Isotope"
21. "The Vegas Renormalization"
22. "The Classified Materials Turbulence"
23. "The Monopolar Expedition"

Season 3

A love affair with Penny has opened a big, wide, wonderful world of romance for Leonard. But Sheldon likes the world just the way it works, thank you. All of which makes for a zany comic triangle with brainy, clueless Sheldon and practical, grounded Penny vying for the role of hypotenuse.

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1. "The Electric Can Opener Fluctuation"
2. "The Jiminy Conjecture"
3. "The Gothowitz Deviation"
4. "The Pirate Solution"
5. "The Creepy Candy Coating Corollary"
6. "The Cornhusker Vortex"
7. "The Guitarist Amplification"
8. "The Adhesive Duck Deficiency"
9. "The Vengeance Formulation"
10. "The Gorilla Experiment"
11. "The Maternal Congruence"
12. "The Psychic Vortex"
13. "The Bozeman Reaction"
14. "The Einstein Approximation"
15. "The Large Hadron Collision"
16. "The Excelsior Acquisition"
17. "The Precious Fragmentation"
18. "The Pants Alternative"
19. "The Wheaton Recurrence"
20. "The Spaghetti Catalyst"
21. "The Plimpton Stimulation"
22. "The Staircase Implementation"
23. "The Lunar Excitation"

Season 4

The Big Bang gang's romantic universe expands. On the rebound from Penny, Leonard falls into the arms of Raj's sister Priya. Sheldon gets a girlfriend, or rather a friend who is a girl: Amy, a dour neurobiologist who declares herself besties with Penny. Howard and Bernadette heat up. And so do Raj and Bernadette (at least in Raj's Bollywood daydream).

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1. "The Robotic Manipulation"
2. "The Cruciferous Vegetable Amplification"
3. "The Zazzy Substitution"
4. "The Hot Troll Deviation"
5. "The Desperation Emanation"
6. "The Irish Pub Formulation"
7. "The Apology Insufficiency"
8. "The 21-Second Excitation"
9. "The Boyfriend Complexity"
10. "The Alien Parasite Hypothesis"
11. "The Justice League Recombination"
12. "The Bus Pants Utilization"
13. "The Love Car Displacement"
14. "The Thespian Catalyst"
15. "The Benefactor Factor"
16. "The Cohabitation Formulation"
17. "The Toast Derivation"
18. "The Prestidigitation Approximation"
19. "The Zarnecki Incursion"
20. "The Herb Garden Germination"
21. "The Agreement Dissection"
22. "The Wildebeest Implementation"
23. "The Engagement Reaction"
24. "The Roommate Transmogrification"

Season 5

Penny and Leonard's relationship is relaunched in full "beta test" mode, while Sheldon, Howard and Raj discover the feminine mystique is something that cannot be easily graphed or calculated. As Sheldon makes begrudging amendments to his "Relationship Agreement" with his "friend-who-happens-to-be-a-girl" Amy, Raj contemplates an arranged marriage, and Howard is all-systems-go for both his NASA space launch and wedding to the spirited Bernadette.

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1. "The Skank Reflex Analysis"
2. "The Infestation Hypothesis"
3. "The Pulled Groin Extrapolation"
4. "The Wiggly Finger Catalyst"
5. "The Russian Rocket Reaction"
6. "The Rhinitis Revelation"
7. "The Good Guy Fluctuation"
8. "The Isolation Permutation"
9. "The Ornithophobia Diffusion"
10. "The Flaming Spittoon Acquisition"
11. "The Speckerman Recurrence"
12. "The Shiny Trinket Maneuver"
13. "The Recombination Hypothesis"
14. "The Beta Test Initiation"
15. "The Friendship Contraction"
16. "The Vacation Solution"
17. "The Rothman Disintegration"
18. "The Werewolf Transformation"
19. "The Weekend Vortex"
20. "The Transporter Malfunction"
21. "The Hawking Excitation"
22. "The Stag Convergence"
23. "The Launch Acceleration"
24. "The Countdown Reflection"

Season 6

Fun discoveries multiply: Leonard leans jealousy is bad for a relationship (With Penny) but science is good for seduction (With Penny). Howard finds life on the International Space Station is no escape from terrestrial turmoil between his overbearing mom and his new wife Bernadette. Raj meets someone special who may be a good match, if only he can keep her from fleeing mid-date. Even Sheldon learns a few things: a) what not to say when called in to meet the university's employee relations director, b) what happens to childhood TV idols and c) that a Dungeons & Dragons adventure can be the icebreaker his relationship with Amy needs.

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1. "The Date Night Variable"
2. "The Decoupling Fluctuation"
3. "The Higgs Boson Observation"
4. "The Re-Entry Minimization"
5. "The Holographic Excitation"
6. "The Extract Obliteration"
7. "The Habitation Configuration"
8. "The 43 Peculiarity"
9. "The Parking Spot Escalation"
10. "The Fish Guts Displacement"
11. "The Santa Simulation"
12. "The Egg Salad Equivalency"
13. "The Bakersfield Expedition"
14. "The Cooper/Kripke Inversion"
15. "The Spoiler Alert Segmentation"
16. "The Tangible Affection Proof"
17. "The Monster Isolation"
18. "The Contractual Obligation Implementation"
19. "The Closet Reconfiguration"
20. "The Tenure Turbulence"
21. "The Closure Alternative"
22. "The Proton Resurgence"
23. "The Love Spell Potential"
24. "The Bon Voyage Reaction"

Season 7

Leonard returns from his North Sea expedition to find that his relationship with Penny involves more beta-testing than he’s ever done in a lab. Howard’s attachment issues with the women in his life in particular and Raj's social breakthrough with women in general provide more laughs. Bernadette and Amy stand staunchly by the men in their life, even when they’re sitting in marathon role-playing games. Sheldon sees his mom in a totally different way, parties with James Earl Jones, establishes a (sort of) bond with his idol Professor Proton and makes a scientific breakthrough that breaks down before you can say Science Friday.

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1. "The Hofstadter Insufficiency"
2. "The Deception Verification"
3. "The Scavenger Vortex"
4. "The Raiders Minimization"
5. "The Workplace Proximity"
6. "The Romance Resonance"
7. "The Proton Displacement"
8. "The Itchy Brain Simulation"
9. "The Thanksgiving Decoupling"
10. "The Discovery Dissipation"
11. "The Cooper Extraction"
12. "The Hesitation Ramification"
13. "The Occupation Recalibration"
14. "The Convention Conundrum"
15. "The Locomotive Manipulation"
16. "The Table Polarization"
17. "The Friendship Turbulence"
18. "The Mommy Observation"
19. "The Indecision Amalgamation"
20. "The Relationship Diremption"
21. "The Anything Can Happen Recurrence"
22. "The Proton Transmogrification"
23. "The Gorilla Dissolution"
24. "The Status Quo Combustion"

Season 8

Enter Phase 8 of the Perpetual Laughter Continuum.

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1. "The Locomotion Interruption"
2. "The Junior Professor Solution"
3. "The First Pitch Insufficiency"
4. "The Hook-up Reverberation"
5. "The Focus Attenuation"
6. "The Expedition Approximation"
7. "The Misinterpretation Agitation"
8. "The Prom Equivalency"
9. "The Septum Deviation"
10. "The Champagne Reflection"
11. "The Clean Room Infiltration"
12. "The Space Prove Disintegration"
13. "The Anxiety Optimization"
14. "The Troll Manifestation"
15. "The Comic Book Store Regeneration"
16. "The Intimacy Acceleration"
17. "The Colonization Application"
18. "The Leftover Thermalization"
19. "The Skywalker Incursion"
20. "The Fortification Implementation"
21. "The Communication Deterioration"
22. "The Graduation Transmission"
23. "The Maternal Combustion"
24. "The Commitment Determination"

Season 9

Lovebirds Leonard and Penny's impetuous Las Vegas wedding hits a speedbump as the guileless groom's bad timing with a prenupital confession nearly puts a stitch in their hitch. Überrational Sheldon and romantically minded Amy invalidate their "Relationship Agreement" - but the laws of attraction bring them back together, along with an unexpected birthday surprise. Howard and Bernadette shakily evolve into the next phase of their ongoing marriage experiment: pending parenthood. Perennial single guy Raj experiences a Valentine's Day to remember, wrestling over his attraction to - and dubious juggling skills with - two attentive gal pals.

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1. "The Matrimonial Momentum"
2. "The Separation Oscillation"
3. "The Bachelor Party Corrosion"
4. "The 2003 Approximation"
5. "The Perspiration Implementation
6. "The Helium Insufficiency"
7. "The Spock Resonance"
8. "The Mystery Date Observation"
9. "The Platonic Permutation"
10. "The Earworm Reverberation"
11. "The Opening Night Excitation"
12. "The Sales Call Sublimination"
13. "The Empathy Optimization"
14. 'The Meemaw Materialization'
15. 'The Valentino Submergence'
16. "The Positive Negative Reaction"
17. "The Celebration Experimentation"
18. "The Application Deterioration"
19. "The Solder Excursion Diversion"
20. "The Big Bear Precipitation"
21. "The Viewing Party Combustion"
22. "The Fermentation Bifcuration"
23. "The Line Substitution Solution"
24. "The Convergence Convergence"

Season 10

The family drama is out of this world.

Last season, Leonard and Penny went from next-door neighbors to next-door newlyweds with a nuptial excursion to Vegas. This season, they find themselves in a repeating paradigm as they re-create their wedding - this time with family including Penny's mother and brother and Leonard's parents. Meanwhile, Sheldon has drafted a new "Roommate Agreement" as he and Amy engage in an experimental cohabitation. Howard and Bernadette prepare for the arrival of Baby Wolowitz, and Raj offers up his expert parenting advice - whether they want it or not!

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1. "The Conjugal Conjecture"
2. "The Military Miniaturization"
3. "The Dependence Transcendence"
4. "The Cohabitation Experimentation"
5. "The Hot Tub Contamination"
6. "The Fetal Kick Catalyst"
7. "The Veracity Elasticity"
8. "The Brain Bowl Incubation"
9. "The Geology Elevation"
10. "The Property Division Collision"
11. "The Birthday Synchronicity"
12. "The Holiday Summation"
13. "The Romance Recalibration"
14. "The Emotion Detection Automation"
15. "The Locomotion Reverberation"
16. "The Allowance Evaporation"
17. "The Comic-Con Conundrum"
18. "The Escape Hatch Identification"
19. "The Collaboration Fluctuation"
20. "The Recollection Dissipation"
21. "The Separation Agitation"
22. "The Cognition Regeneration"
23. "The Gyroscopic Collapse"
24. "The Long Distance Dissonance"

Season 11

Expect the unexpected.

Despite their on-again, off-again relationship, Leonard and Penny have tied the knot. Even Sheldon has entered into a "Relationship Agreement" with Amy, and he recently took their relationship to the next level by proposing marriage. Will the possibility of domestic bliss alter the chemistry between these two extreme achievers? Will Leonard prove to be a brilliant writer? Will Raj's search for new love rival his search for new stars in the cosmos? Will Howard and Bernadette's growing family reach critical mass?

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1. "The Proposal Proposal"
2. "The Retraction Reaction"
3. "The Relaxation Integration"
4. "The Explosion Implosion"
5. "The Collaboration Contamination"
6. 'The Proton Regeneration'
7. "The Geology Methodology"
8. "The Tesla Recoil"
9. "The Bitcoin Entanglement"
10. 'The Confidence Erosion'
11. 'The Celebration Reverberation'
12. 'The Matrimonial Metric'
13. 'The Solo Oscillation'
14. 'The Separation Triangulation'
15. 'The Novelization Correlation'
16. "The Neonatal Nomenclature"
17. "The Athenaeum Allocation"
18. "The Gates Excitation"
19. "The Tenant Disassociation"
20. "The Reclusive Potential"
21. "The Comet Polarization"
22. "The Monetary Insufficiency"
23. "The Sibling Realignment"
24. "The Bow Tie Asymmetry"

Season 12

Biggest. Last. Best. Bang. Ever.

Despite being socially challenged outside of their physicist jobs, Leonard married Penny, and Sheldon, after a long courtship, weds Amy. And while Howard and his wife, Bernadette, explore the predicament of being married with two kids, Raj considers a traditional arranged marriage. As the supersmart friends solve quotidian conundrums posed by academia, family crises and video games, their experiments in domestic bliss never fail to produce hilarious results. But all good theories arrive at a conclusion.

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1. "The Conjugal Configuration"
2. 'The Wedding Gift Wormhole'
3. "The Procreation Calculation"
4. "The Tam Turbulence"
5. "The Planetarium Collision"
6. "The Imitation Perturbation"
7. 'The Grant Allocation Derivation'
8. 'The Consummation Deviation'
9. "The Citation Negation"
10. "The VCR Illumination"
11. "The Paintball Scattering"
12. "The Propagation Proposition"
13. "The Confirmation Polarization"
14. "The Meteorite Manifestation"
15. "The Donation Oscillation"
16. "The D & D Vortex"
17. "The Conference Valuation"
18. "The Laureate Accumulation"
19. "The Inspiration Deprivation"
20. "The Decision Reverberation"
21. "The Plagiarism Schism"
22. "The Maternal Conclusion"
23. "The Change Constant"
24. "The Stockholm Syndrome" (series finale)
25. "Unravelling the Mystery: A Big Bang Farewell" Johnny Galecki and Kaley Cuoco host a retrospective with clips from the show, interviews, set tours, etc.. This special is included on the Season 12 Blu-ray set. It may or may not be on the Season 12 DVD set.