Season 1 (2007)

8.07 avg 17 episodes 8.1 → 8.5 21 min avg

Big finale
Rebound

Season 1 episodes — IMDb ratings
#	Title	Rating	Votes
1	Pilot	8.1	8,362
2	The Big Bran Hypothesis	8.2	6,751
3	The Fuzzy Boots Corollary	7.6	6,081
4	The Luminous Fish Effect	8.0	6,130
5	The Hamburger Postulate	7.8	5,830
6	The Middle Earth Paradigm	8.3	6,053
7	The Dumpling Paradox	8.0	5,736
8	The Grasshopper Experiment	8.1	5,747
9	The Cooper-Hofstadter Polarization	7.9	5,553
10	The Loobenfeld Decay	8.0	5,681
11	The Pancake Batter Anomaly	8.2	5,651
12	The Jerusalem Duality	7.8	5,377
13	The Bat Jar Conjecture	8.2	5,540
14	The Nerdvana Annihilation	8.0	5,430
15	The Pork Chop Indeterminacy	8.2	5,676
16	The Peanut Reaction	8.3	5,342
17	The Tangerine Factor	8.5	5,591

Season 2 (2008)

8.16 avg 23 episodes 8.2 → 8.2 21 min avg

Rollercoaster
Mid-peak

Season 2 episodes — IMDb ratings
#	Title	Rating	Votes
1	The Bad Fish Paradigm	8.2	5,436
2	The Codpiece Topology	8.0	5,042
3	The Barbarian Sublimation	8.7	5,875
4	The Griffin Equivalency	7.8	5,091
5	The Euclid Alternative	8.3	5,217
6	The Cooper-Nowitzki Theorem	8.1	5,224
7	The Panty Piñata Polarization	8.6	5,527
8	The Lizard-Spock Expansion	8.0	4,997
9	The White Asparagus Triangulation	8.0	4,944
10	The Vartabedian Conundrum	7.6	4,842
11	The Bath Item Gift Hypothesis	9.1	8,032
12	The Killer Robot Instability	7.8	4,882
13	The Friendship Algorithm	7.9	4,847
14	The Financial Permeability	7.9	4,809
15	The Maternal Capacitance	8.8	5,767
16	The Cushion Saturation	8.1	4,821
17	The Terminator Decoupling	8.0	5,177
18	The Work Song Nanocluster	8.1	4,847
19	The Dead Hooker Juxtaposition	8.1	4,887
20	The Hofstadter Isotope	7.8	4,685
21	The Vegas Renormalization	8.4	5,045
22	The Classified Materials Turbulence	8.1	4,643
23	The Monopolar Expedition	8.2	4,790

Season 3 (2009)

8.19 avg 23 episodes 8.2 → 8.6 21 min avg

Rebound

Season 3 episodes — IMDb ratings
#	Title	Rating	Votes
1	The Electric Can Opener Fluctuation	8.2	5,094
2	The Jiminy Conjecture	7.7	4,673
3	The Gothowitz Deviation	8.1	4,798
4	The Pirate Solution	8.0	4,688
5	The Creepy Candy Coating Corollary	8.3	4,803
6	The Cornhusker Vortex	7.4	4,525
7	The Guitarist Amplification	7.7	4,550
8	The Adhesive Duck Deficiency	8.9	6,382
9	The Vengeance Formulation	8.3	4,755
10	The Gorilla Experiment	8.4	4,822
11	The Maternal Congruence	8.3	4,733
12	The Psychic Vortex	8.2	4,645
13	The Bozeman Reaction	8.0	4,544
14	The Einstein Approximation	8.4	4,927
15	The Large Hadron Collision	8.0	4,464
16	The Excelsior Acquisition	8.2	4,581
17	The Precious Fragmentation	8.4	4,826
18	The Pants Alternative	8.3	4,745
19	The Wheaton Recurrence	7.8	4,451
20	The Spaghetti Catalyst	8.1	4,456
21	The Plimpton Stimulation	8.1	4,754
22	The Staircase Implementation	9.0	6,137
23	The Lunar Excitation	8.6	4,858

Season 4 (2010)

8.03 avg 24 episodes 8.7 → 8.5 21 min avg

Season 4 episodes — IMDb ratings
#	Title	Rating	Votes
1	The Robotic Manipulation	8.7	5,364
2	The Cruciferous Vegetable Amplification	8.3	4,820
3	The Zazzy Substitution	7.9	4,578
4	The Hot Troll Deviation	8.0	4,539
5	The Desperation Emanation	7.6	4,378
6	The Irish Pub Formulation	8.0	4,456
7	The Apology Insufficiency	8.0	4,474
8	The 21-Second Excitation	8.1	4,490
9	The Boyfriend Complexity	8.4	4,689
10	The Alien Parasite Hypothesis	7.6	4,350
11	The Justice League Recombination	8.6	4,980
12	The Bus Pants Utilization	7.5	4,333
13	The Love Car Displacement	8.2	4,673
14	The Thespian Catalyst	7.7	4,400
15	The Benefactor Factor	7.7	4,365
16	The Cohabitation Formulation	7.8	4,223
17	The Toast Derivation	7.9	4,250
18	The Prestidigitation Approximation	8.1	4,441
19	The Zarnecki Incursion	8.0	4,317
20	The Herb Garden Germination	8.2	4,314
21	The Agreement Dissection	8.2	4,429
22	The Wildebeest Implementation	7.7	4,191
23	The Engagement Reaction	8.0	4,268
24	The Roommate Transmogrification	8.5	4,540

Season 5 (2011)

7.92 avg 24 episodes 8.0 → 8.5 21 min avg

Rebound

Season 5 episodes — IMDb ratings
#	Title	Rating	Votes
1	The Skank Reflex Analysis	8.0	4,925
2	The Infestation Hypothesis	8.0	4,438
3	The Pulled Groin Extrapolation	7.6	4,261
4	The Wiggly Finger Catalyst	7.8	4,327
5	The Russian Rocket Reaction	8.0	4,287
6	The Rhinitis Revelation	7.5	4,219
7	The Good Guy Fluctuation	8.5	5,069
8	The Isolation Permutation	7.6	4,178
9	The Ornithophobia Diffusion	8.1	4,395
10	The Flaming Spittoon Acquisition	7.9	4,233
11	The Speckerman Recurrence	7.3	4,214
12	The Shiny Trinket Maneuver	7.6	4,201
13	The Recombination Hypothesis	8.1	4,441
14	The Beta Test Initiation	8.2	4,423
15	The Friendship Contraction	7.7	4,060
16	The Vacation Solution	7.5	4,038
17	The Rothman Disintegration	7.7	4,141
18	The Werewolf Transformation	8.2	4,352
19	The Weekend Vortex	8.1	4,160
20	The Transporter Malfunction	8.0	4,292
21	The Hawking Excitation	8.5	4,746
22	The Stag Convergence	7.7	4,108
23	The Launch Acceleration	8.1	4,073
24	The Countdown Reflection	8.5	4,610

Season 6 (2012)

7.95 avg 24 episodes 7.6 → 7.7 21 min avg

Mid-peak

Season 6 episodes — IMDb ratings
#	Title	Rating	Votes
1	The Date Night Variable	7.6	5,070
2	The Decoupling Fluctuation	7.6	4,215
3	The Higgs Boson Observation	7.9	4,240
4	The Re-Entry Minimization	8.2	4,545
5	The Holographic Excitation	8.0	4,205
6	The Extract Obliteration	7.8	4,045
7	The Habitation Configuration	7.6	4,025
8	The 43 Peculiarity	8.4	4,604
9	The Parking Spot Escalation	8.2	4,493
10	The Fish Guts Displacement	8.0	4,270
11	The Santa Simulation	7.8	4,105
12	The Egg Salad Equivalency	8.4	4,567
13	The Bakersfield Expedition	8.4	4,582
14	The Cooper/Kripke Inversion	7.7	4,032
15	The Spoiler Alert Segmentation	8.2	4,185
16	The Tangible Affection Proof	7.8	4,062
17	The Monster Isolation	7.6	3,912
18	The Contractual Obligation Implementation	7.7	3,991
19	The Closet Reconfiguration	8.1	4,247
20	The Tenure Turbulence	8.0	4,076
21	The Closure Alternative	8.0	4,047
22	The Proton Resurgence	7.9	4,203
23	The Love Spell Potential	8.1	4,204
24	The Bon Voyage Reaction	7.7	3,999

Season 7 (2013)

7.85 avg 24 episodes 7.7 → 8.0 20 min avg

Rollercoaster
Mid-peak

Season 7 episodes — IMDb ratings
#	Title	Rating	Votes
1	The Hofstadter Insufficiency	7.7	4,433
2	The Deception Verification	7.9	4,373
3	The Scavenger Vortex	8.7	5,358
4	The Raiders Minimization	7.8	4,077
5	The Workplace Proximity	7.6	3,898
6	The Romance Resonance	8.4	4,645
7	The Proton Displacement	7.7	3,968
8	The Itchy Brain Simulation	7.5	3,949
9	The Thanksgiving Decoupling	8.8	5,500
10	The Discovery Dissipation	7.6	3,710
11	The Cooper Extraction	8.1	4,159
12	The Hesitation Ramification	7.4	3,768
13	The Occupation Recalibration	7.5	3,763
14	The Convention Conundrum	8.0	4,115
15	The Locomotive Manipulation	8.2	4,256
16	The Table Polarization	7.6	3,665
17	The Friendship Turbulence	7.4	3,611
18	The Mommy Observation	7.4	3,700
19	The Indecision Amalgamation	8.1	3,967
20	The Relationship Diremption	8.0	3,740
21	The Anything Can Happen Recurrence	7.5	3,579
22	The Proton Transmogrification	7.7	3,765
23	The Gorilla Dissolution	7.8	3,729
24	The Status Quo Combustion	8.0	3,835

Season 8 (2014)

7.47 avg 24 episodes 7.2 → 7.9 20 min avg

Season 8 episodes — IMDb ratings
#	Title	Rating	Votes
1	The Locomotion Interruption	7.2	4,329
2	The Junior Professor Solution	7.5	4,054
3	The First Pitch Insufficiency	7.0	3,988
4	The Hook-up Reverberation	7.2	3,766
5	The Focus Attenuation	7.5	3,881
6	The Expedition Approximation	7.2	3,725
7	The Misinterpretation Agitation	7.7	4,082
8	The Prom Equivalency	8.0	4,099
9	The Septum Deviation	7.5	3,655
10	The Champagne Reflection	7.0	3,726
11	The Clean Room Infiltration	7.4	3,623
12	The Space Probe Disintegration	7.2	3,514
13	The Anxiety Optimization	7.4	3,511
14	The Troll Manifestation	8.0	3,814
15	The Comic Book Store Regeneration	8.1	3,908
16	The Intimacy Acceleration	7.8	3,679
17	The Colonization Application	7.5	3,468
18	The Leftover Thermalization	7.3	3,452
19	The Skywalker Incursion	7.5	3,470
20	The Fortification Implementation	7.5	3,442
21	The Communication Deterioration	7.0	3,359
22	The Graduation Transmission	7.3	3,420
23	The Maternal Combustion	7.5	3,508
24	The Commitment Determination	7.9	3,932

Season 9 (2015)

7.57 avg 24 episodes 6.8 → 7.8 19 min avg

Mid-peak

Season 9 episodes — IMDb ratings
#	Title	Rating	Votes
1	The Matrimonial Momentum	6.8	4,320
2	The Separation Oscillation	7.3	3,709
3	The Bachelor Party Corrosion	7.7	3,789
4	The 2003 Approximation	7.4	3,578
5	The Perspiration Implementation	7.4	3,495
6	The Helium Insufficiency	7.2	3,568
7	The Spock Resonance	7.9	3,681
8	The Mystery Date Observation	7.9	3,693
9	The Platonic Permutation	7.7	3,695
10	The Earworm Reverberation	8.3	4,160
11	The Opening Night Excitation	9.0	6,031
12	The Sales Call Sublimation	7.4	3,329
13	The Empathy Optimization	7.4	3,352
14	The Meemaw Materialization	7.5	3,404
15	The Valentino Submergence	7.5	3,345
16	The Positive Negative Reaction	7.4	3,477
17	The Celebration Experimentation	7.6	3,504
18	The Application Deterioration	7.5	3,279
19	The Solder Excursion Diversion	7.4	3,202
20	The Big Bear Precipitation	7.4	3,177
21	The Viewing Party Combustion	7.4	3,172
22	The Fermentation Bifurcation	7.4	3,112
23	The Line Substitution Solution	7.4	3,125
24	The Convergence Convergence	7.8	3,527

Season 10 (2016)

7.40 avg 24 episodes 7.8 → 8.6 19 min avg

Big finale
Rebound

Season 10 episodes — IMDb ratings
#	Title	Rating	Votes
1	The Conjugal Conjecture	7.8	4,092
2	The Military Miniaturization	7.3	3,338
3	The Dependence Transcendence	7.2	3,224
4	The Cohabitation Experimentation	7.9	3,502
5	The Hot Tub Contamination	7.4	3,175
6	The Fetal Kick Catalyst	7.4	3,243
7	The Veracity Elasticity	7.9	3,433
8	The Brain Bowl Incubation	8.0	3,548
9	The Geology Elevation	7.4	3,131
10	The Property Division Collision	7.3	3,139
11	The Birthday Synchronicity	7.6	3,198
12	The Holiday Summation	7.3	3,220
13	The Romance Recalibration	6.9	3,097
14	The Emotion Detection Automation	7.2	3,035
15	The Locomotion Reverberation	7.3	2,997
16	The Allowance Evaporation	7.1	2,906
17	The Comic-Con Conundrum	7.4	2,958
18	The Escape Hatch Identification	7.1	2,909
19	The Collaboration Fluctuation	7.1	2,960
20	The Recollection Dissipation	7.2	2,927
21	The Separation Agitation	7.2	2,965
22	The Cognition Regeneration	6.8	2,916
23	The Gyroscopic Collapse	7.1	2,867
24	The Long Distance Dissonance	8.6	4,013

Season 11 (2017)

7.33 avg 24 episodes 7.5 → 9.0 20 min avg

Big finale
Rebound

Season 11 episodes — IMDb ratings
#	Title	Rating	Votes
1	The Proposal Proposal	7.5	3,527
2	The Retraction Reaction	7.2	3,166
3	The Relaxation Integration	7.0	3,015
4	The Explosion Implosion	7.1	2,952
5	The Collaboration Contamination	7.3	2,976
6	The Proton Regeneration	7.2	2,944
7	The Geology Methodology	7.4	2,964
8	The Tesla Recoil	7.1	2,868
9	The Bitcoin Entanglement	7.7	3,113
10	The Confidence Erosion	7.3	2,898
11	The Celebration Reverberation	7.1	2,825
12	The Matrimonial Metric	7.5	2,878
13	The Solo Oscillation	7.2	2,862
14	The Separation Triangulation	7.2	2,914
15	The Novelization Correlation	7.5	2,844
16	The Neonatal Nomenclature	7.1	2,769
17	The Athenaeum Allocation	6.8	2,788
18	The Gates Excitation	7.1	2,828
19	The Tenant Disassociation	7.2	2,787
20	The Reclusive Potential	7.2	2,792
21	The Comet Polarization	7.4	2,804
22	The Monetary Insufficiency	7.2	2,740
23	The Sibling Realignment	7.7	2,947
24	The Bow Tie Asymmetry	9.0	4,941

Season 12 (2018)

7.47 avg 24 episodes 7.2 → 9.5 20 min avg

Big finale
Rebound

Season 12 episodes — IMDb ratings
#	Title	Rating	Votes
1	The Conjugal Configuration	7.2	3,249
2	The Wedding Gift Wormhole	7.6	3,124
3	The Procreation Calculation	7.2	2,987
4	The Tam Turbulence	7.0	2,900
5	The Planetarium Collision	6.8	2,906
6	The Imitation Perturbation	8.2	3,520
7	The Grant Allocation Derivation	7.3	2,859
8	The Consummation Deviation	7.3	2,926
9	The Citation Negation	7.2	2,881
10	The VCR Illumination	7.5	3,005
11	The Paintball Scattering	7.3	2,834
12	The Propagation Proposition	7.1	2,772
13	The Confirmation Polarization	7.1	2,798
14	The Meteorite Manifestation	7.1	2,778
15	The Donation Oscillation	7.4	2,858
16	The D & D Vortex	7.9	3,163
17	The Conference Valuation	7.1	2,770
18	The Laureate Accumulation	7.1	2,742
19	The Inspiration Deprivation	7.0	2,791
20	The Decision Reverberation	7.1	2,733
21	The Plagiarism Schism	7.3	2,824
22	The Maternal Conclusion	7.9	3,404
23	The Change Constant	9.0	5,745
24	The Stockholm Syndrome	9.5	11,917

The Big Bang Theory (2007)

Seasons