Season 1 (2007)

8.07 avg 17 episodes 8.1 → 8.5 21 min avg

Season 1 episodes — IMDb ratings
#	Title	Rating	Votes
1	Pilot	8.1	8,396
2	The Big Bran Hypothesis	8.2	6,755
3	The Fuzzy Boots Corollary	7.6	6,085
4	The Luminous Fish Effect	8.0	6,133
5	The Hamburger Postulate	7.8	5,829
6	The Middle Earth Paradigm	8.3	6,048
7	The Dumpling Paradox	8.0	5,735
8	The Grasshopper Experiment	8.1	5,745
9	The Cooper-Hofstadter Polarization	7.9	5,549
10	The Loobenfeld Decay	8.0	5,680
11	The Pancake Batter Anomaly	8.2	5,645
12	The Jerusalem Duality	7.8	5,368
13	The Bat Jar Conjecture	8.2	5,530
14	The Nerdvana Annihilation	8.0	5,421
15	The Pork Chop Indeterminacy	8.2	5,668
16	The Peanut Reaction	8.3	5,331
17	The Tangerine Factor	8.5	5,578

Season 2 (2008)

8.15 avg 23 episodes 8.2 → 8.2 21 min avg

Season 2 episodes — IMDb ratings
#	Title	Rating	Votes
1	The Bad Fish Paradigm	8.2	5,421
2	The Codpiece Topology	7.9	5,026
3	The Barbarian Sublimation	8.7	5,858
4	The Griffin Equivalency	7.8	5,068
5	The Euclid Alternative	8.3	5,195
6	The Cooper-Nowitzki Theorem	8.1	5,202
7	The Panty Piñata Polarization	8.6	5,513
8	The Lizard-Spock Expansion	8.0	4,977
9	The White Asparagus Triangulation	8.0	4,922
10	The Vartabedian Conundrum	7.6	4,821
11	The Bath Item Gift Hypothesis	9.1	8,016
12	The Killer Robot Instability	7.8	4,865
13	The Friendship Algorithm	7.9	4,829
14	The Financial Permeability	7.9	4,782
15	The Maternal Capacitance	8.8	5,747
16	The Cushion Saturation	8.1	4,804
17	The Terminator Decoupling	8.0	5,160
18	The Work Song Nanocluster	8.1	4,834
19	The Dead Hooker Juxtaposition	8.1	4,873
20	The Hofstadter Isotope	7.8	4,674
21	The Vegas Renormalization	8.4	5,028
22	The Classified Materials Turbulence	8.1	4,625
23	The Monopolar Expedition	8.2	4,774

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	5,080
2	The Jiminy Conjecture	7.7	4,662
3	The Gothowitz Deviation	8.1	4,780
4	The Pirate Solution	8.0	4,671
5	The Creepy Candy Coating Corollary	8.3	4,778
6	The Cornhusker Vortex	7.4	4,490
7	The Guitarist Amplification	7.7	4,527
8	The Adhesive Duck Deficiency	8.9	6,368
9	The Vengeance Formulation	8.3	4,732
10	The Gorilla Experiment	8.4	4,794
11	The Maternal Congruence	8.3	4,707
12	The Psychic Vortex	8.2	4,616
13	The Bozeman Reaction	8.0	4,523
14	The Einstein Approximation	8.4	4,899
15	The Large Hadron Collision	8.0	4,437
16	The Excelsior Acquisition	8.2	4,552
17	The Precious Fragmentation	8.4	4,804
18	The Pants Alternative	8.3	4,715
19	The Wheaton Recurrence	7.8	4,424
20	The Spaghetti Catalyst	8.1	4,429
21	The Plimpton Stimulation	8.1	4,725
22	The Staircase Implementation	9.0	6,109
23	The Lunar Excitation	8.6	4,827

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	5,337
2	The Cruciferous Vegetable Amplification	8.3	4,796
3	The Zazzy Substitution	7.9	4,551
4	The Hot Troll Deviation	8.0	4,515
5	The Desperation Emanation	7.6	4,352
6	The Irish Pub Formulation	8.0	4,432
7	The Apology Insufficiency	8.0	4,447
8	The 21-Second Excitation	8.1	4,459
9	The Boyfriend Complexity	8.4	4,658
10	The Alien Parasite Hypothesis	7.6	4,322
11	The Justice League Recombination	8.6	4,946
12	The Bus Pants Utilization	7.5	4,301
13	The Love Car Displacement	8.2	4,650
14	The Thespian Catalyst	7.7	4,360
15	The Benefactor Factor	7.7	4,333
16	The Cohabitation Formulation	7.8	4,183
17	The Toast Derivation	7.9	4,213
18	The Prestidigitation Approximation	8.1	4,408
19	The Zarnecki Incursion	8.0	4,280
20	The Herb Garden Germination	8.2	4,277
21	The Agreement Dissection	8.2	4,395
22	The Wildebeest Implementation	7.7	4,159
23	The Engagement Reaction	8.0	4,234
24	The Roommate Transmogrification	8.5	4,507

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	4,889
2	The Infestation Hypothesis	8.0	4,401
3	The Pulled Groin Extrapolation	7.6	4,222
4	The Wiggly Finger Catalyst	7.8	4,287
5	The Russian Rocket Reaction	8.0	4,247
6	The Rhinitis Revelation	7.5	4,182
7	The Good Guy Fluctuation	8.5	5,031
8	The Isolation Permutation	7.6	4,142
9	The Ornithophobia Diffusion	8.1	4,353
10	The Flaming Spittoon Acquisition	7.9	4,194
11	The Speckerman Recurrence	7.3	4,177
12	The Shiny Trinket Maneuver	7.6	4,164
13	The Recombination Hypothesis	8.1	4,405
14	The Beta Test Initiation	8.2	4,386
15	The Friendship Contraction	7.7	4,024
16	The Vacation Solution	7.5	4,000
17	The Rothman Disintegration	7.7	4,108
18	The Werewolf Transformation	8.2	4,317
19	The Weekend Vortex	8.1	4,126
20	The Transporter Malfunction	8.0	4,256
21	The Hawking Excitation	8.5	4,705
22	The Stag Convergence	7.7	4,067
23	The Launch Acceleration	8.1	4,033
24	The Countdown Reflection	8.5	4,571

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	5,027
2	The Decoupling Fluctuation	7.6	4,176
3	The Higgs Boson Observation	7.9	4,197
4	The Re-Entry Minimization	8.2	4,506
5	The Holographic Excitation	8.0	4,159
6	The Extract Obliteration	7.8	3,999
7	The Habitation Configuration	7.6	3,977
8	The 43 Peculiarity	8.4	4,563
9	The Parking Spot Escalation	8.2	4,449
10	The Fish Guts Displacement	8.0	4,224
11	The Santa Simulation	7.8	4,056
12	The Egg Salad Equivalency	8.4	4,520
13	The Bakersfield Expedition	8.4	4,535
14	The Cooper/Kripke Inversion	7.7	3,986
15	The Spoiler Alert Segmentation	8.2	4,133
16	The Tangible Affection Proof	7.8	4,009
17	The Monster Isolation	7.6	3,859
18	The Contractual Obligation Implementation	7.7	3,938
19	The Closet Reconfiguration	8.1	4,196
20	The Tenure Turbulence	8.0	4,029
21	The Closure Alternative	8.0	3,994
22	The Proton Resurgence	7.9	4,151
23	The Love Spell Potential	8.1	4,152
24	The Bon Voyage Reaction	7.7	3,948

Season 7 (2013)

7.85 avg 24 episodes 7.7 → 8.0 20 min avg

Season 7 episodes — IMDb ratings
#	Title	Rating	Votes
1	The Hofstadter Insufficiency	7.7	4,387
2	The Deception Verification	7.9	4,324
3	The Scavenger Vortex	8.7	5,319
4	The Raiders Minimization	7.8	4,024
5	The Workplace Proximity	7.6	3,843
6	The Romance Resonance	8.4	4,594
7	The Proton Displacement	7.7	3,921
8	The Itchy Brain Simulation	7.5	3,913
9	The Thanksgiving Decoupling	8.8	5,488
10	The Discovery Dissipation	7.6	3,711
11	The Cooper Extraction	8.1	4,167
12	The Hesitation Ramification	7.4	3,783
13	The Occupation Recalibration	7.5	3,783
14	The Convention Conundrum	8.0	4,141
15	The Locomotive Manipulation	8.2	4,281
16	The Table Polarization	7.5	3,693
17	The Friendship Turbulence	7.4	3,636
18	The Mommy Observation	7.4	3,723
19	The Indecision Amalgamation	8.1	3,994
20	The Relationship Diremption	8.0	3,768
21	The Anything Can Happen Recurrence	7.5	3,612
22	The Proton Transmogrification	7.7	3,790
23	The Gorilla Dissolution	7.8	3,755
24	The Status Quo Combustion	8.0	3,860

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	4,357
2	The Junior Professor Solution	7.5	4,082
3	The First Pitch Insufficiency	7.0	4,016
4	The Hook-up Reverberation	7.2	3,792
5	The Focus Attenuation	7.5	3,911
6	The Expedition Approximation	7.2	3,750
7	The Misinterpretation Agitation	7.7	4,111
8	The Prom Equivalency	8.0	4,130
9	The Septum Deviation	7.5	3,689
10	The Champagne Reflection	7.0	3,752
11	The Clean Room Infiltration	7.4	3,652
12	The Space Probe Disintegration	7.2	3,544
13	The Anxiety Optimization	7.4	3,542
14	The Troll Manifestation	8.0	3,847
15	The Comic Book Store Regeneration	8.1	3,940
16	The Intimacy Acceleration	7.8	3,712
17	The Colonization Application	7.5	3,496
18	The Leftover Thermalization	7.3	3,484
19	The Skywalker Incursion	7.5	3,502
20	The Fortification Implementation	7.5	3,473
21	The Communication Deterioration	7.0	3,386
22	The Graduation Transmission	7.3	3,446
23	The Maternal Combustion	7.5	3,542
24	The Commitment Determination	7.9	3,960

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	4,354
2	The Separation Oscillation	7.3	3,736
3	The Bachelor Party Corrosion	7.7	3,816
4	The 2003 Approximation	7.4	3,608
5	The Perspiration Implementation	7.4	3,522
6	The Helium Insufficiency	7.2	3,597
7	The Spock Resonance	7.9	3,710
8	The Mystery Date Observation	7.9	3,720
9	The Platonic Permutation	7.7	3,725
10	The Earworm Reverberation	8.3	4,188
11	The Opening Night Excitation	9.0	6,057
12	The Sales Call Sublimation	7.4	3,357
13	The Empathy Optimization	7.4	3,379
14	The Meemaw Materialization	7.5	3,432
15	The Valentino Submergence	7.5	3,373
16	The Positive Negative Reaction	7.4	3,504
17	The Celebration Experimentation	7.6	3,536
18	The Application Deterioration	7.5	3,307
19	The Solder Excursion Diversion	7.4	3,230
20	The Big Bear Precipitation	7.4	3,205
21	The Viewing Party Combustion	7.4	3,200
22	The Fermentation Bifurcation	7.4	3,140
23	The Line Substitution Solution	7.4	3,153
24	The Convergence Convergence	7.8	3,558

Season 10 (2016)

7.40 avg 24 episodes 7.8 → 8.6 19 min avg

Season 10 episodes — IMDb ratings
#	Title	Rating	Votes
1	The Conjugal Conjecture	7.8	4,120
2	The Military Miniaturization	7.3	3,366
3	The Dependence Transcendence	7.2	3,252
4	The Cohabitation Experimentation	7.9	3,533
5	The Hot Tub Contamination	7.4	3,204
6	The Fetal Kick Catalyst	7.4	3,270
7	The Veracity Elasticity	7.9	3,465
8	The Brain Bowl Incubation	8.0	3,581
9	The Geology Elevation	7.4	3,161
10	The Property Division Collision	7.3	3,169
11	The Birthday Synchronicity	7.6	3,228
12	The Holiday Summation	7.3	3,254
13	The Romance Recalibration	6.9	3,128
14	The Emotion Detection Automation	7.2	3,066
15	The Locomotion Reverberation	7.3	3,025
16	The Allowance Evaporation	7.1	2,934
17	The Comic-Con Conundrum	7.4	2,985
18	The Escape Hatch Identification	7.1	2,935
19	The Collaboration Fluctuation	7.1	2,986
20	The Recollection Dissipation	7.2	2,954
21	The Separation Agitation	7.2	2,992
22	The Cognition Regeneration	6.8	2,949
23	The Gyroscopic Collapse	7.2	2,893
24	The Long Distance Dissonance	8.6	4,043

Season 11 (2017)

7.33 avg 24 episodes 7.5 → 9.0 20 min avg

Season 11 episodes — IMDb ratings
#	Title	Rating	Votes
1	The Proposal Proposal	7.5	3,552
2	The Retraction Reaction	7.2	3,192
3	The Relaxation Integration	7.0	3,037
4	The Explosion Implosion	7.1	2,977
5	The Collaboration Contamination	7.3	3,000
6	The Proton Regeneration	7.2	2,969
7	The Geology Methodology	7.4	2,990
8	The Tesla Recoil	7.1	2,891
9	The Bitcoin Entanglement	7.7	3,141
10	The Confidence Erosion	7.3	2,923
11	The Celebration Reverberation	7.1	2,850
12	The Matrimonial Metric	7.5	2,906
13	The Solo Oscillation	7.2	2,889
14	The Separation Triangulation	7.2	2,940
15	The Novelization Correlation	7.5	2,870
16	The Neonatal Nomenclature	7.1	2,792
17	The Athenaeum Allocation	6.8	2,813
18	The Gates Excitation	7.1	2,850
19	The Tenant Disassociation	7.2	2,811
20	The Reclusive Potential	7.2	2,813
21	The Comet Polarization	7.4	2,827
22	The Monetary Insufficiency	7.2	2,764
23	The Sibling Realignment	7.7	2,978
24	The Bow Tie Asymmetry	9.0	4,977

Season 12 (2018)

7.47 avg 24 episodes 7.2 → 9.5 20 min avg

Season 12 episodes — IMDb ratings
#	Title	Rating	Votes
1	The Conjugal Configuration	7.2	3,279
2	The Wedding Gift Wormhole	7.6	3,153
3	The Procreation Calculation	7.2	3,012
4	The Tam Turbulence	7.0	2,923
5	The Planetarium Collision	6.8	2,932
6	The Imitation Perturbation	8.2	3,553
7	The Grant Allocation Derivation	7.3	2,883
8	The Consummation Deviation	7.3	2,951
9	The Citation Negation	7.2	2,908
10	The VCR Illumination	7.5	3,034
11	The Paintball Scattering	7.3	2,859
12	The Propagation Proposition	7.1	2,795
13	The Confirmation Polarization	7.1	2,817
14	The Meteorite Manifestation	7.1	2,801
15	The Donation Oscillation	7.4	2,882
16	The D & D Vortex	7.9	3,187
17	The Conference Valuation	7.1	2,793
18	The Laureate Accumulation	7.1	2,762
19	The Inspiration Deprivation	7.0	2,815
20	The Decision Reverberation	7.1	2,758
21	The Plagiarism Schism	7.3	2,847
22	The Maternal Conclusion	7.9	3,429
23	The Change Constant	9.0	5,789
24	The Stockholm Syndrome	9.5	12,014

The Big Bang Theory (2007)

Cast

Seasons