* 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 hi-jinks. The series ran on CBS from 2007 to 2019.

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

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.

- "Pilot"
- "The Big Bran Hypothesis"
- "The Fuzzy Boots Corollary"
- "The Luminous Fish Effect"
- "The Hamburger Postulate"
- "The Middle-Earth Paradigm"
- "The Dumpling Paradox"
- "The Grasshopper Experiment"
- "The Cooper-Hofstadter Polarization"
- "The Loobenfeld Decay"
- "The Pancake Batter Anomaly"
- "The Jerusalem Duality"
- "The Bat Jar Conjecture"
- "The Nerdvana Annihilation"
- "The Pork Chop Indeterminacy"
- "The Peanut Reaction"
- "The Tangerine Factor"

At work, physicists Leonard and Sheldon and their geek pals conquer the cosmos. At home, real life – from dating to driving – conquers them. This season, 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.

- "The Bad Fish Paradigm"
- "The Codpiece Topology"
- "The Barbarian Sublimation"
- "The Griffin Equivalency"
- "The Euclid Alternative"
- "The Cooper-Nowitzki Theorem"
- "The Panty Pinata Polarization"
- "The Lizard-Spock Expansion"
- "The White Asparagus Triangulation"
- "The Vartabedian Conundrum"
- "The Bath Item Gift Hypothesis"
- "The Killer Robot Instability"
- "The Friendship Algorithm"
- "The Financial Permeability"
- "The Maternal Capacitance"
- "The Cushion Saturation"
- "The Terminator Decoupling"
- "The Work Song Nanocluster"
- "The Dead Hooker Juxtaposition"
- "The Hofstadter Isotope"
- "The Vegas Renormalization"
- "The Classified Materials Turbulence"
- "The Monopolar Expedition"

- "The Electric Can Opener Fluctuation"
- "The Jiminy Conjecture"
- "The Gothowitz Deviation"
- "The Pirate Solution"
- "The Creepy Candy Coating Corollary"
- "The Cornhusker Vortex"
- "The Guitarist Amplification"
- "The Adhesive Duck Deficiency"
- "The Vengeance Formulation"
- "The Gorilla Experiment"
- "The Maternal Congruence"
- "The Psychic Vortex"
- "The Bozeman Reaction"
- "The Einstein Approximation"
- "The Large Hadron Collision"
- "The Excelsior Acquisition"
- "The Precious Fragmentation"
- "The Pants Alternative"
- "The Wheaton Recurrence"
- "The Spaghetti Catalyst"
- "The Plimpton Stimulation"
- "The Staircase Implementation"
- "The Lunar Excitation"

This season 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).

- "The Robotic Manipulation"
- "The Cruciferous Vegetable Amplification"
- "The Zazzy Substitution"
- "The Hot Troll Deviation"
- "The Desperation Emanation"
- "The Irish Pub Formulation"
- "The Apology Insufficiency"
- "The 21-Second Excitation"
- 'The Boyfriend Complexity'
- 'The Alien Parasite Hypothesis'
- 'The Justice League Recombination'
- "The Bus Pants Utilization"
- "The Love Car Displacement"
- 'The Thespian Catalyst'
- 'The Benefactor Factor'
- "The Cohabitation Formulation"
- 'The Toast Derivation'
- 'The Prestidigitation Approximation'
- 'The Zarnecki Incursion'
- "The Herb Garden Germination"
- "The Agreement Dissection"
- "The Wildebeest Implementation"
- "The Engagement Reaction"
- "The Roommate Transmogrification"

- "The Skank Reflex Analysis"
- "The Infestation Hypothesis"
- 'The Pulled Groin Extrapolation'
- 'The Wiggly Finger Catalyst'
- 'The Russian Rocket Reaction'
- 'The Rhinitis Revelation'
- "The Good Guy Fluctuation"
- "The Isolation Permutation"
- "The Ornithophobia Diffusion"
- 'The Flaming Spittoon Acquisition'
- 'The Speckerman Recurrence'
- 'The Shiny Trinket Maneuver'
- 'The Recombination Hypothesis'
- 'The Beta Test Initiation'
- "The Friendship Contraction"
- "The Vacation Solution"
- "The Rothman Disintegration"
- "The Werewolf Tranformation"
- "The Weekend Vortex"
- "The Transporter Malfunction"
- "The Hawking Excitation"
- "The Stag Convergence"
- "The Launch Acceleration"
- "The Countdown Reflection"

- 'The Date Night Variable'
- 'The Decoupling Fluctuation'
- 'The Higgs Boson Observation'
- "The Re-Entry Minimization"
- 'The Holographic Excitation'
- 'The Extract Obliteration'
- 'The Habitation Configuration'
- "The 43 Peculiarity"
- "The Parking Spot Escalation"
- 'The Fish Guts Displacement'
- 'The Santa Simulation'
- 'The Egg Salad Equivalency'
- "The Bakersfield Expedition"
- "The Cooper/Kripke Inversion"
- "The Spoiler Alert Segmentation"
- "The Tangible Affection Proof"
- "The Monster Isolation"
- "The Contractual Obligation Implementation"
- "The Closet Reconfiguration"
- "The Tenure Turbulence"
- "The Closure Alternative"
- "The Proton Resurgence"
- "The Love Spell Potential"
- "The Bon Voyage Reaction"

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.

- "The Hofstadter Insufficiency"
- "The Deception Verification"
- "The Scavenger Vortex"
- "The Raiders Minimization"
- 'The Workplace Proximity'
- 'The Romance Resonance'
- 'The Proton Displacement'
- 'The Itchy Brain Simulation'
- "The Thanksgiving Decoupling"
- "The Discovery Dissipation"
- "The Cooper Extraction"
- 'The Hesitation Ramification'
- 'The Occupation Recalibration'
- 'The Convention Conundrum'
- 'The Locomotive Manipulation'
- 'The Table Polarization'
- "The Friendship Turbulence"
- 'The Mommy Observation'
- 'The Indecision Amalgamation'
- 'The Relationship Diremption'
- 'The Anything Can Happen Recurrence'
- 'The Proton Transmogrification'
- "The Gorilla Dissolution"
- "The Status Quo Combustion"

- "The Locomotion Interruption"
- "The Junior Professor Solution"
- 'The First Pitch Insufficiency'
- 'The Hook-up Reverberation'
- 'The Focus Attenuation'
- 'The Expedition Approximation'
- 'The Misinterpretation Agitation'
- 'The Prom Equivalency'
- 'The Septum Deviation'
- 'The Champagne Reflection'
- 'The Clean Room Infiltration'
- 'The Space Prove Disintegration'
- 'The Anxiety Optimization'
- 'The Troll Manifestation'
- "The Comic Book Store Regeneration"
- 'The Intimacy Acceleration'
- 'The Colonization Application'
- 'The Leftover Thermalization'
- 'The Skywalker Incursion'
- 'The Fortification Implementation'
- 'The Communication Deterioration'
- 'The Graduation Transmission'
- 'The Maternal Combustion'
- "The Commitment Determination"

- "The Matrimonial Momentum"
- "The Separation Oscillation"
- "The Bachelor Party Corrosion"
- "The 2003 Approximation"
- "The Perspiration Implementation
- "The Helium Insufficiency"
- "The Spock Resonance"
- "The Mystery Date Observation"
- "The Platonic Permutation"
- "The Earworm Reverberation"
- "The Opening Night Excitation"
- 'The Sales Call Sublimination'
- 'The Empathy Optimization'
- 'The Meemaw Materialization'
- 'The Valentino Submergence'
- 'The Positive Negative Reaction'
- 'The Celebration Experimentation'
- 'The Application Deterioration'
- 'The Solder Excursion Diversion'
- 'The Big Bear Precipitation'
- 'The Viewing Party Combustion'
- 'The Fermentation Bifcuration'
- "The Line Substitution Solution"
- 'The Convergence Convergence'

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!

- "The Conjugal Conjecture"
- "The Military Miniaturization"
- "The Dependence Transcendence"
- "The Cohabitation Experimentation"
- "The Hot Tub Contamination"
- "The Fetal Kick Catalyst"
- "The Veracity Elasticity"
- "The Brain Bowl Incubation"
- "The Geology Elevation"
- "The Property Division Collision"
- "The Birthday Synchronicity"
- "The Holiday Summation"
- "The Romance Recalibration"
- "The Emotion Detection Automation"
- "The Locomotion Reverberation"
- "The Allowance Evaporation"
- "The Comic-Con Conundrum"
- "The Escape Hatch Identification"
- "The Collaboration Fluctuation"
- "The Recollection Dissipation"
- "The Separation Agitation"
- "The Cognition Regeneration"
- "The Gyroscopic Collapse"
- "The Long Distance Dissonance"

- "The Proposal Proposal"
- "The Retraction Reaction"
- 'The Relaxation Integration'
- 'The Explosion Implosion'
- 'The Collaboration Contamination'
- 'The Proton Regeneration'
- "The Geology Methodology"
- "The Tesla Recoil"
- "The Bitcoin Entanglement"
- 'The Confidence Erosion'
- 'The Celebration Reverberation'
- 'The Matrimonial Metric'
- 'The Solo Oscillation'
- 'The Separation Triangulation'
- 'The Novelization Correlation'
- 'The Neonatal Nomenclature'
- 'The Athenaeum Allocation'
- 'The Gates Excitation'
- "The Tenant Disassociation"
- "The Reclusive Potential"
- "The Comet Polarization"
- "The Monetary Insufficiency"
- "The Sibling Realignment"
- "The Bow Tie Asymmetry"

- "The Conjugal Configuration"
- 'The Wedding Gift Wormhole'
- 'The Procreation Calculation'
- 'The Tam Turbulence'
- 'The Planetarium Collision'
- 'The Imitation Perturbation'
- 'The Grant Allocation Derivation'
- 'The Consummation Deviation'
- "The Citation Negation"
- "The VCR Illumination"
- "The Paintball Scattering"
- "The Propagation Proposition"
- "The Confirmation Polarization"
- "The Meteorite Manifestation"
- "The Donation Oscillation"
- "The D & D Vortex"
- "The Conference Valuation"
- "The Laureate Accumulation"
- "The Inspiration Deprivation"
- "The Decision Reverberation"
- "The Plagiarism Schism"
- "The Maternal Conclusion"
- "The Change Constant"
- "The Stockholm Syndrome"
- 'Unravelling the Mystery: A Big Bang Farewell'