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The cast dressed up for a formal dinner party during season 6.
The following is a list of episodes of the CBS sitcom “The Big Bang Theory” chronologically.
As of May 16, 2019, 279 episodes aired in 12 seasons.
Series Summary
| Season | Episodes | Season Premiere | Season Finale | |
|---|---|---|---|---|
| 1 | 17 | September 24, 2007 | May 19, 2008 | |
| 2 | 23 | September 22, 2008 | May 11, 2009 | |
| 3 | 23 | September 21, 2009 | May 24, 2010 | |
| 4 | 24 | September 23, 2010 | May 19, 2011 | |
| 5 | 24 | September 22, 2011 | May 10, 2012 | |
| 6 | 24 | September 27, 2012 | May 16, 2013 | |
| 7 | 24 | September 26, 2013 | May 15, 2014 | |
| 8 | 24 | September 22, 2014 | May 7, 2015 | |
| 9 | 24 | September 21, 2015 | May 12, 2016 | |
| 10 | 24 | September 19, 2016 | May 11, 2017 | |
| 11 | 24 | September 25, 2017 | May 10, 2018 | |
| 12 | 24 | September 24, 2018 | May 16, 2019 |
Season 1: 2007–2008
Main article: Season 1
| Title | Original Airdate | Series Ep# |
|---|---|---|
| Pilot | September 24, 2007 | 1 |
| The Big Bran Hypothesis | October 1, 2007 | 2 |
|
The Fuzzy Boots Corollary |
October 8, 2007 | 3 |
| The Luminous Fish Effect | October 15, 2007 | 4 |
| The Hamburger Postulate | October 22, 2007 | 5 |
| The Middle-Earth Paradigm | October 29, 2007 | 6 |
| The Dumpling Paradox | November 5, 2007 | 7 |
| The Grasshopper Experiment | November 12, 2007 | 8 |
| The Cooper-Hofstadter Polarization | March 17, 2008 | 9 |
| The Loobenfeld Decay | March 24, 2008 | 10 |
| The Pancake Batter Anomaly | March 31, 2008 | 11 |
| The Jerusalem Duality | April 14, 2008 | 12 |
| The Bat Jar Conjecture | April 21, 2008 | 13 |
| The Nerdvana Annihilation | April 28, 2008 | 14 |
| The Porkchop Indeterminacy | May 5, 2008 | 15 |
| The Peanut Reaction | May 12, 2008 | 16 |
| The Tangerine Factor | May 19, 2008 | 17 |
Season 2: 2008–2009
Main article: Season 2
| Title | Original Airdate | Series Ep# |
|---|---|---|
| The Bad Fish Paradigm | September 22, 2008 | 18 |
| The Codpiece Topology | September 29, 2008 | 19 |
| The Barbarian Sublimation | October 6, 2008 | 20 |
| The Griffin Equivalency | October 13, 2008 | 21 |
| The Euclid Alternative | October 20, 2008 | 22 |
| The Cooper-Nowitzki Theorem | November 3, 2008 | 23 |
| The Panty Piñata Polarization | November 10, 2008 | 24 |
| The Lizard-Spock Expansion | November 17, 2008 | 25 |
| The White Asparagus Triangulation | November 24, 2008 | 26 |
| The Vartabedian Conundrum | December 8, 2008 | 27 |
| The Bath Item Gift Hypothesis | December 15, 2008 | 28 |
| The Killer Robot Instability | January 12, 2009 | 29 |
| The Friendship Algorithm | January 19, 2009 | 30 |
| The Financial Permeability | February 2, 2009 | 31 |
| The Maternal Capacitance | February 9, 2009 | 32 |
| The Cushion Saturation | March 2, 2009 | 33 |
| The Terminator Decoupling | March 9, 2009 | 34 |
| The Work Song Nanocluster | March 16, 2009 | 35 |
| The Dead Hooker Juxtaposition | March 30, 2009 | 36 |
| The Hofstadter Isotope | April 13, 2009 | 37 |
| The Vegas Renormalization | April 27, 2009 | 38 |
| The Classified Materials Turbulence | May 4, 2009 | 39 |
| The Monopolar Expedition | May 11, 2009 | 40 |
Season 3: 2009–2010
Main article: Season 3
| Title | Original Airdate | Series Ep# |
|---|---|---|
| The Electric Can Opener Fluctuation | September 21, 2009 | 41 |
| The Jiminy Conjecture | September 28, 2009 | 42 |
| The Gothowitz Deviation | October 5, 2009 | 43 |
| The Pirate Solution | October 12, 2009 | 44 |
| The Creepy Candy Coating Corollary | October 19, 2009 | 45 |
| The Cornhusker Vortex | November 2, 2009 | 46 |
| The Guitarist Amplification | November 9, 2009 | 47 |
| The Adhesive Duck Deficiency | November 16, 2009 | 48 |
| The Vengeance Formulation | November 23, 2009 | 49 |
| The Gorilla Experiment | December 7, 2009 | 50 |
| The Maternal Congruence | December 14, 2009 | 51 |
| The Psychic Vortex | January 11, 2010 | 52 |
| The Bozeman Reaction | January 18, 2010 | 53 |
| The Einstein Approximation | February 1, 2010 | 54 |
| The Large Hadron Collision | February 8, 2010 | 55 |
| The Excelsior Acquisition | March 1, 2010 | 56 |
| The Precious Fragmentation | March 8, 2010 | 57 |
| The Pants Alternative | March 22, 2010 | 58 |
| The Wheaton Recurrence | April 12, 2010 | 59 |
| The Spaghetti Catalyst | May 3, 2010 | 60 |
| The Plimpton Stimulation | May 10, 2010 | 61 |
| The Staircase Implementation | May 17, 2010 | 62 |
| The Lunar Excitation | May 24, 2010 | 63 |
Season 4: 2010–2011
Main article: Season 4
| Title | Original Airdate | Series Ep# |
|---|---|---|
| The Robotic Manipulation | September 23, 2010 | 64 |
| The Cruciferous Vegetable Amplification | September 30, 2010 | 65 |
| The Zazzy Substitution | October 7, 2010 | 66 |
| The Hot Troll Deviation | October 14, 2010 | 67 |
| The Desperation Emanation | October 21, 2010 | 68 |
| The Irish Pub Formulation | October 28, 2010 | 69 |
| The Apology Insufficiency | November 4, 2010 | 70 |
| The 21-Second Excitation | November 11, 2010 | 71 |
| The Boyfriend Complexity | November 18, 2010 | 72 |
| The Alien Parasite Hypothesis | December 9, 2010 | 73 |
| The Justice League Recombination | December 16, 2010 | 74 |
| The Bus Pants Utilization | January 6, 2011 | 75 |
| The Love Car Displacement | January 20, 2011 | 76 |
| The Thespian Catalyst | February 3, 2011 | 77 |
| The Benefactor Factor | February 10, 2011 | 78 |
| The Cohabitation Formulation | February 17, 2011 | 79 |
| The Toast Derivation | February 24, 2011 | 80 |
| The Prestidigitation Approximation | March 10, 2011 | 81 |
| The Zarnecki Incursion | March 31, 2011 | 82 |
| The Herb Garden Germination | April 7, 2011 | 83 |
| The Agreement Dissection | April 28, 2011 | 84 |
| The Wildebeest Implementation | May 5, 2011 | 85 |
| The Engagement Reaction | May 12, 2011 | 86 |
| The Roommate Transmogrification | May 19, 2011 | 87 |
Season 5: 2011–2012
Main article: Season 5
| Title | Original Airdate | Series Ep# |
|---|---|---|
| The Skank Reflex Analysis | September 22, 2011 | 88 |
| The Infestation Hypothesis | September 22, 2011 | 89 |
| The Pulled Groin Extrapolation | September 29, 2011 | 90 |
| The Wiggly Finger Catalyst | October 6, 2011 | 91 |
| The Russian Rocket Reaction | October 13, 2011 | 92 |
| The Rhinitis Revelation | October 20, 2011 | 93 |
| The Good Guy Fluctuation | October 27, 2011 | 94 |
| The Isolation Permutation | November 3, 2011 | 95 |
| The Ornithophobia Diffusion | November 10, 2011 | 96 |
| The Flaming Spittoon Acquisition | November 17, 2011 | 97 |
| The Speckerman Recurrence | December 8, 2011 | 98 |
| The Shiny Trinket Maneuver | January 12, 2012 | 99 |
| The Recombination Hypothesis | January 19, 2012 | 100 |
| The Beta Test Initiation | January 26, 2012 | 101 |
| The Friendship Contraction | February 2, 2012 | 102 |
| The Vacation Solution | February 9, 2012 | 103 |
| The Rothman Disintegration | February 16, 2012 | 104 |
| The Werewolf Transformation | February 23, 2012 | 105 |
| The Weekend Vortex | March 8, 2012 | 106 |
| The Transporter Malfunction | March 29, 2012 | 107 |
| The Hawking Excitation | April 5, 2012 | 108 |
| The Stag Convergence | April 26, 2012 | 109 |
| The Launch Acceleration | May 3, 2012 | 110 |
| The Countdown Reflection | May 10, 2012 | 111 |
Season 6: 2012–2013
Main article: Season 6
| Title | Original Airdate | Series Ep# |
|---|---|---|
| The Date Night Variable | September 27, 2012 | 112 |
| The Decoupling Fluctuation | October 4, 2012 | 113 |
| The Higgs Boson Observation | October 11, 2012 | 114 |
| The Re-Entry Minimization | October 18, 2012 | 115 |
| The Holographic Excitation | October 25, 2012 | 116 |
| The Extract Obliteration | November 1, 2012 | 117 |
| The Habitation Configuration | November 8, 2012 | 118 |
| The 43 Peculiarity | November 15, 2012 | 119 |
| The Parking Spot Escalation | November 29, 2012 | 120 |
| The Fish Guts Displacement | December 6, 2012 | 121 |
| The Santa Simulation | December 13, 2012 | 122 |
| The Egg Salad Equivalency | January 3, 2013 | 123 |
| The Bakersfield Expedition | January 10, 2013 | 124 |
| The Cooper/Kripke Inversion | January 31, 2013 | 125 |
| The Spoiler Alert Segmentation | February 7, 2013 | 126 |
| The Tangible Affection Proof | February 14, 2013 | 127 |
| The Monster Isolation | February 21, 2013 | 128 |
| The Contractual Obligation Implementation | March 7, 2013 | 129 |
| The Closet Reconfiguration | March 14, 2013 | 130 |
| The Tenure Turbulence | April 4, 2013 | 131 |
| The Closure Alternative | April 25, 2013 | 132 |
| The Proton Resurgence | May 2, 2013 | 133 |
| The Love Spell Potential | May 9, 2013 | 134 |
| The Bon Voyage Reaction | May 16, 2013 | 135 |
Season 7: 2013–2014
Main article: Season 7
| Title | Original Airdate | Series Ep# |
|---|---|---|
| The Hofstadter Insufficiency | September 26, 2013 | 136 |
| The Deception Verification | September 26, 2013 | 137 |
| The Scavenger Vortex | October 3, 2013 | 138 |
| The Raiders Minimization | October 10, 2013 | 139 |
| The Workplace Proximity | October 17, 2013 | 140 |
| The Romance Resonance | October 24, 2013 | 141 |
| The Proton Displacement | November 7, 2013 | 142 |
| The Itchy Brain Simulation | November 14, 2013 | 143 |
| The Thanksgiving Decoupling | November 21, 2013 | 144 |
| The Discovery Dissipation | December 5, 2013 | 145 |
| The Cooper Extraction | December 12, 2013 | 146 |
| The Hesitation Ramification | January 2, 2014 | 147 |
| The Occupation Recalibration | January 9, 2014 | 148 |
| The Convention Conundrum | January 30, 2014 | 149 |
| The Locomotive Manipulation | February 6, 2014 | 150 |
| The Table Polarization | February 27, 2014 | 151 |
| The Friendship Turbulence | March 6, 2014 | 152 |
| The Mommy Observation | March 13, 2014 | 153 |
| The Indecision Amalgamation | April 3, 2014 | 154 |
| The Relationship Diremption | April 10, 2014 | 155 |
| The Anything Can Happen Recurrence | April 24, 2014 | 156 |
| The Proton Transmogrification | May 1, 2014 | 157 |
| The Gorilla Dissolution | May 8, 2014 | 158 |
| The Status Quo Combustion | May 15, 2014 | 159 |
Season 8: 2014–2015
Main article: Season 8
| Title | Original Airdate | Series Ep# |
|---|---|---|
| The Locomotion Interruption | September 22, 2014 | 160 |
| The Junior Professor Solution | September 22, 2014 | 161 |
| The First Pitch Insufficiency | September 29, 2014 | 162 |
| The Hook-up Reverberation | October 6, 2014 | 163 |
| The Focus Attenuation | October 13, 2014 | 164 |
| The Expedition Approximation | October 20, 2014 | 165 |
| The Misinterpretation Agitation | October 30, 2014 | 166 |
| The Prom Equivalency | November 6, 2014 | 167 |
| The Septum Deviation | November 13, 2014 | 168 |
| The Champagne Reflection | November 20, 2014 | 169 |
| The Clean Room Infiltration | December 11, 2014 | 170 |
| The Space Probe Disintegration | January 8, 2015 | 171 |
| The Anxiety Optimization | January 29, 2015 | 172 |
| The Troll Manifestation | February 5, 2015 | 173 |
| The Comic Book Store Regeneration | February 19, 2015 | 174 |
| The Intimacy Acceleration | February 26, 2015 | 175 |
| The Colonization Application | March 5, 2015 | 176 |
| The Leftover Thermalization | March 12, 2015 | 177 |
| The Skywalker Incursion | April 2, 2015 | 178 |
| The Fortification Implementation | April 9, 2015 | 179 |
| The Communication Deterioration | April 16, 2015 | 180 |
| The Graduation Transmission | April 23, 2015 | 181 |
| The Maternal Combustion | April 30, 2015 | 182 |
| The Commitment Determination | May 7, 2015 | 183 |
Season 9: 2015–2016
Main article: Season 9
| Title | Original Airdate | Series Ep# |
|---|---|---|
| The Matrimonial Momentum | September 21, 2015 | 184 |
| The Separation Oscillation | September 28, 2015 | 185 |
| The Bachelor Party Corrosion | October 5, 2015 | 186 |
| The 2003 Approximation | October 12, 2015 | 187 |
| The Perspiration Implementation | October 19, 2015 | 188 |
| The Helium Insufficiency | October 26, 2015 | 189 |
| The Spock Resonance | November 5, 2015 | 190 |
| The Mystery Date Observation | November 12, 2015 | 191 |
| The Platonic Permutation | November 19, 2015 | 192 |
| The Earworm Reverberation | December 10, 2015 | 193 |
| The Opening Night Excitation | December 17, 2015 | 194 |
| The Sales Call Sublimation | January 7, 2016 | 195 |
| The Empathy Optimization | January 14, 2016 | 196 |
| The Meemaw Materialization | February 4, 2016 | 197 |
| The Valentino Submergence | February 11, 2016 | 198 |
| The Positive Negative Reaction | February 18, 2016 | 199 |
| The Celebration Experimentation | February 25, 2016 | 200 |
| The Application Deterioration | March 10, 2016 | 201 |
| The Solder Excursion Diversion | March 31, 2016 | 202 |
| The Big Bear Precipitation | April 7, 2016 | 203 |
| The Viewing Party Combustion | April 21, 2016 | 204 |
| The Fermentation Bifurcation | April 28, 2016 | 205 |
| The Line Substitution Solution | May 5, 2016 | 206 |
| The Convergence-Convergence | May 12, 2016 | 207 |
Season 10: 2016–2017
Main article: Season 10
| Title | Original Airdate | Series Ep# |
|---|---|---|
| The Conjugal Conjecture | September 19, 2016 | 208 |
| The Military Miniaturization | September 26, 2016 | 209 |
| The Dependence Transcendence | October 3, 2016 | 210 |
| The Cohabitation Experimentation | October 10, 2016 | 211 |
| The Hot Tub Contamination | October 17, 2016 | 212 |
| The Fetal Kick Catalyst | October 27, 2016 | 213 |
| The Veracity Elasticity | November 3, 2016 | 214 |
| The Brain Bowl Incubation | November 10, 2016 | 215 |
| The Geology Elevation | November 17, 2016 | 216 |
| The Property Division Collision | December 1, 2016 | 217 |
| The Birthday Synchronicity | December 15, 2016 | 218 |
| The Holiday Summation | January 5, 2017 | 219 |
| The Romance Recalibration | January 19, 2017 | 220 |
| The Emotion Detection Automation | February 2, 2017 | 221 |
| The Locomotion Reverberation | February 9, 2017 | 222 |
| The Allowance Evaporation | February 16, 2017 | 223 |
| The Comic-Con Conundrum | February 23, 2017 | 224 |
| The Escape Hatch Identification | March 9, 2017 | 225 |
| The Collaboration Fluctuation | March 30, 2017 | 226 |
| The Recollection Dissipation | April 6, 2017 | 227 |
| The Separation Agitation | April 13, 2017 | 228 |
| The Cognition Regeneration | April 27, 2017 | 229 |
| The Gyroscopic Collapse | May 4, 2017 | 230 |
| The Long Distance Dissonance | May 11, 2017 | 231 |
Season 11: 2017-2018
Main article: Season 11
| Title | Original Airdate | Series Ep# |
|---|---|---|
| The Proposal Proposal | September 25, 2017 | 232 |
| The Retraction Reaction | October 2, 2017 | 233 |
| The Relaxation Integration | October 9, 2017 | 234 |
| The Explosion Implosion | October 16, 2017 | 235 |
| The Collaboration Contamination | October 23, 2017 | 236 |
| The Proton Regeneration | November 2, 2017 | 237 |
| The Geology Methodology | November 9, 2017 | 238 |
| The Tesla Recoil | November 16, 2017 | 239 |
| The Bitcoin Entanglement | November 30, 2017 | 240 |
| The Confidence Erosion | December 7, 2017 | 241 |
| The Celebration Experimentation | December 14, 2017 | 242 |
| The Matrimonial Metric | January 4, 2018 | 243 |
| The Solo Oscillation | January 11, 2018 | 244 |
| The Separation Triangulation | January 18, 2018 | 245 |
| The Novelization Correlation | February 1, 2018 | 246 |
| The Neonatal Nomenclature | March 1, 2018 | 247 |
| The Athenaeum Allocation | March 8, 2018 | 248 |
| The Gates Excitation | March 29, 2018 | 249 |
| The Tenant Disassociation | April 5, 2018 | 250 |
| The Reclusive Potential | April 12, 2018 | 251 |
| The Comet Polarization | April 19, 2018 | 252 |
| The Monetary Insufficiency | April 26, 2018 | 253 |
| The Sibling Realignment | May 3, 2018 | 254 |
| The Bow Tie Asymmetry | May 10, 2018 | 255 |
Season 12: 2018-2019
Main article: Season 12
| Title | Original Airdate | Series Ep# |
|---|---|---|
| The Conjugal Configuration | September 24, 2018 | 256 |
| The Wedding Gift Wormhole | October 1, 2018 | 257 |
| The Procreation Calculation | October 8, 2018 | 258 |
| The Tam Turbulence | October 15, 2018 | 259 |
| The Planetarium Collision | October 22, 2018 | 260 |
| The Imitation Perturbation | October 29, 2018 | 261 |
| The Grant Allocation Derivation | November 1, 2018 | 262 |
| The Consummation Deviation | November 8, 2018 | 263 |
| The Citation Negation | November 15, 2018 | 264 |
| The VCR Illumination | December 6, 2018 | 265 |
| The Paintball Scattering | January 3, 2019 | 266 |
| The Propagation Proposition | January 10, 2019 | 267 |
| The Confirmation Polarization | January 17, 2019 | 268 |
| The Meteorite Manifestation | January 31, 2019 | 269 |
| The Donation Oscillation | February 7, 2019 | 270 |
| The D & D Vortex | February 21, 2019 | 271 |
| The Conference Valuation | March 7, 2019 | 272 |
| The Laureate Accumulation | April 4, 2019 | 273 |
| The Inspiration Deprivation | April 18, 2019 | 274 |
| The Decision Reverberation | April 25, 2019 | 275 |
| The Plagiarism Schism | May 2, 2019 | 276 |
| The Maternal Conclusion | May 9, 2019 | 277 |
| The Change Constant | May 16, 2019 | 278 |
| The Stockholm Syndrome | May 16, 2019 | 279 |
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