S05E23: The Launch Acceleration
When NASA moves up Howard's mission, he must face his fears and Bernadette's dad, thus putting the wedding plans in jeopardy. Meanwhile, Leonard says something surprising to Penny in the bedroom.
Previous Episode 
Season 1
Pilot
S1E1 / 24 Sep 2007
The Big Bran Hypothesis
S1E2 / 01 Oct 2007
The Fuzzy Boots Corollary
S1E3 / 08 Oct 2007
The Luminous Fish Effect
S1E4 / 15 Oct 2007
The Hamburger Postulate
S1E5 / 22 Oct 2007
The Middle-Earth Paradigm
S1E6 / 29 Oct 2007
The Dumpling Paradox
S1E7 / 05 Nov 2007
The Grasshopper Experiment
S1E8 / 12 Nov 2007
The Cooper-Hofstadter Polarization
S1E9 / 17 Mar 2008
The Loobenfeld Decay
S1E10 / 24 Mar 2008
The Pancake Batter Anomaly
S1E11 / 31 Mar 2008
The Jerusalem Duality
S1E12 / 14 Apr 2008
The Bat Jar Conjecture
S1E13 / 21 Apr 2008
The Nerdvana Annihilation
S1E14 / 28 Apr 2008
The Pork Chop Indeterminacy
S1E15 / 05 May 2008
The Peanut Reaction
S1E16 / 12 May 2008
The Tangerine Factor
S1E17 / 19 May 2008
Season 2
The Bad Fish Paradigm
S2E1 / 22 Sep 2008
The Codpiece Topology
S2E2 / 29 Sep 2008
The Barbarian Sublimation
S2E3 / 06 Oct 2008
The Griffin Equivalency
S2E4 / 13 Oct 2008
The Euclid Alternative
S2E5 / 20 Oct 2008
The Cooper-Nowitzki Theorem
S2E6 / 03 Nov 2008
The Panty Piñata Polarization
S2E7 / 10 Nov 2008
The Lizard-Spock Expansion
S2E8 / 17 Nov 2008
The White Asparagus Triangulation
S2E9 / 24 Nov 2008
The Vartabedian Conundrum
S2E10 / 08 Dec 2008
The Bath Item Gift Hypothesis
S2E11 / 15 Dec 2008
The Killer Robot Instability
S2E12 / 12 Jan 2009
The Friendship Algorithm
S2E13 / 19 Jan 2009
The Financial Permeability
S2E14 / 02 Feb 2009
The Maternal Capacitance
S2E15 / 09 Feb 2009
The Cushion Saturation
S2E16 / 02 Mar 2009
The Terminator Decoupling
S2E17 / 09 Mar 2009
The Work Song Nanocluster
S2E18 / 16 Mar 2009
The Dead Hooker Juxtaposition
S2E19 / 30 Mar 2009
The Hofstadter Isotope
S2E20 / 13 Apr 2009
The Vegas Renormalization
S2E21 / 27 Apr 2009
The Classified Materials Turbulence
S2E22 / 04 May 2009
The Monopolar Expedition
S2E23 / 11 May 2009
Season 3
The Electric Can Opener Fluctuation
S3E1 / 21 Sep 2009
The Jiminy Conjecture
S3E2 / 28 Sep 2009
The Gothowitz Deviation
S3E3 / 05 Oct 2009
The Pirate Solution
S3E4 / 12 Oct 2009
The Creepy Candy Coating Corollary
S3E5 / 19 Oct 2009
The Cornhusker Vortex
S3E6 / 02 Nov 2009
The Guitarist Amplification
S3E7 / 09 Nov 2009
The Adhesive Duck Deficiency
S3E8 / 16 Nov 2009
The Vengeance Formulation
S3E9 / 23 Nov 2009
The Gorilla Experiment
S3E10 / 07 Dec 2009
The Maternal Congruence
S3E11 / 14 Dec 2009
The Psychic Vortex
S3E12 / 11 Jan 2010
The Bozeman Reaction
S3E13 / 18 Jan 2010
The Einstein Approximation
S3E14 / 01 Feb 2010
The Large Hadron Collision
S3E15 / 08 Feb 2010
The Excelsior Acquisition
S3E16 / 01 Mar 2010
The Precious Fragmentation
S3E17 / 08 Mar 2010
The Pants Alternative
S3E18 / 22 Mar 2010
The Wheaton Recurrence
S3E19 / 12 Apr 2010
The Spaghetti Catalyst
S3E20 / 03 May 2010
The Plimpton Stimulation
S3E21 / 10 May 2010
The Staircase Implementation
S3E22 / 17 May 2010
The Lunar Excitation
S3E23 / 24 May 2010
Season 4
The Robotic Manipulation
S4E1 / 23 Sep 2010
The Cruciferous Vegetable Amplification
S4E2 / 30 Sep 2010
The Zazzy Substitution
S4E3 / 07 Oct 2010
The Hot Troll Deviation
S4E4 / 14 Oct 2010
The Desperation Emanation
S4E5 / 21 Oct 2010
The Irish Pub Formulation
S4E6 / 28 Oct 2010
The Apology Insufficiency
S4E7 / 04 Nov 2010
The 21-Second Excitation
S4E8 / 11 Nov 2010
The Boyfriend Complexity
S4E9 / 18 Nov 2010
The Alien Parasite Hypothesis
S4E10 / 09 Dec 2010
The Justice League Recombination
S4E11 / 16 Dec 2010
The Bus Pants Utilization
S4E12 / 06 Jan 2011
The Love Car Displacement
S4E13 / 20 Jan 2011
The Thespian Catalyst
S4E14 / 03 Feb 2011
The Benefactor Factor
S4E15 / 10 Feb 2011
The Cohabitation Formulation
S4E16 / 17 Feb 2011
The Toast Derivation
S4E17 / 24 Feb 2011
The Prestidigitation Approximation
S4E18 / 10 Mar 2011
The Zarnecki Incursion
S4E19 / 31 Mar 2011
The Herb Garden Germination
S4E20 / 07 Apr 2011
The Agreement Dissection
S4E21 / 28 Apr 2011
The Wildebeest Implementation
S4E22 / 05 May 2011
The Engagement Reaction
S4E23 / 12 May 2011
The Roommate Transmogrification
S4E24 / 19 May 2011
Season 5
The Skank Reflex Analysis
S5E1 / 22 Sep 2011
The Infestation Hypothesis
S5E2 / 22 Sep 2011
The Pulled Groin Extrapolation
S5E3 / 29 Sep 2011
The Wiggly Finger Catalyst
S5E4 / 06 Oct 2011
The Russian Rocket Reaction
S5E5 / 13 Oct 2011
The Rhinitis Revelation
S5E6 / 20 Oct 2011
The Good Guy Fluctuation
S5E7 / 27 Oct 2011
The Isolation Permutation
S5E8 / 03 Nov 2011
The Ornithophobia Diffusion
S5E9 / 10 Nov 2011
The Flaming Spittoon Acquisition
S5E10 / 17 Nov 2011
The Speckerman Recurrence
S5E11 / 08 Dec 2011
The Shiny Trinket Maneuver
S5E12 / 12 Jan 2012
The Recombination Hypothesis
S5E13 / 19 Jan 2012
The Beta Test Initiation
S5E14 / 26 Jan 2012
The Friendship Contraction
S5E15 / 02 Feb 2012
The Vacation Solution
S5E16 / 09 Feb 2012
The Rothman Disintegration
S5E17 / 16 Feb 2012
The Werewolf Transformation
S5E18 / 23 Feb 2012
The Weekend Vortex
S5E19 / 08 Mar 2012
The Transporter Malfunction
S5E20 / 29 Mar 2012
The Hawking Excitation
S5E21 / 05 Apr 2012
The Stag Convergence
S5E22 / 26 Apr 2012
The Launch Acceleration
S5E23 / 03 May 2012
The Countdown Reflection
S5E24 / 10 May 2012
Season 6
The Date Night Variable
S6E1 / 27 Sep 2012
The Decoupling Fluctuation
S6E2 / 04 Oct 2012
The Higgs Boson Observation
S6E3 / 11 Oct 2012
The Re-Entry Minimization
S6E4 / 18 Oct 2012
The Holographic Excitation
S6E5 / 25 Oct 2012
The Extract Obliteration
S6E6 / 01 Nov 2012
The Habitation Configuration
S6E7 / 08 Nov 2012
The 43 Peculiarity
S6E8 / 15 Nov 2012
The Parking Spot Escalation
S6E9 / 29 Nov 2012
The Fish Guts Displacement
S6E10 / 06 Dec 2012
The Santa Simulation
S6E11 / 13 Dec 2012
The Egg Salad Equivalency
S6E12 / 03 Jan 2013
The Bakersfield Expedition
S6E13 / 10 Jan 2013
The Cooper/Kripke Inversion
S6E14 / 31 Jan 2013
The Spoiler Alert Segmentation
S6E15 / 07 Feb 2013
The Tangible Affection Proof
S6E16 / 14 Feb 2013
The Monster Isolation
S6E17 / 21 Feb 2013
The Contractual Obligation Implementation
S6E18 / 07 Mar 2013
The Closet Reconfiguration
S6E19 / 14 Mar 2013
The Tenure Turbulence
S6E20 / 04 Apr 2013
The Closure Alternative
S6E21 / 25 Apr 2013
The Proton Resurgence
S6E22 / 02 May 2013
The Love Spell Potential
S6E23 / 09 May 2013
The Bon Voyage Reaction
S6E24 / 16 May 2013
Season 7
The Hofstadter Insufficiency
S7E1 / 26 Sep 2013
The Deception Verification
S7E2 / 26 Sep 2013
The Scavenger Vortex
S7E3 / 03 Oct 2013
The Raiders Minimization
S7E4 / 10 Oct 2013
The Workplace Proximity
S7E5 / 17 Oct 2013
The Romance Resonance
S7E6 / 24 Oct 2013
The Proton Displacement
S7E7 / 07 Nov 2013
The Itchy Brain Simulation
S7E8 / 14 Nov 2013
The Thanksgiving Decoupling
S7E9 / 21 Nov 2013
The Discovery Dissipation
S7E10 / 05 Dec 2013
The Cooper Extraction
S7E11 / 12 Dec 2013
The Hesitation Ramification
S7E12 / 02 Jan 2014
The Occupation Recalibration
S7E13 / 09 Jan 2014
The Convention Conundrum
S7E14 / 30 Jan 2014
The Locomotive Manipulation
S7E15 / 06 Feb 2014
The Table Polarization
S7E16 / 27 Feb 2014
The Friendship Turbulence
S7E17 / 06 Mar 2014
The Mommy Observation
S7E18 / 13 Mar 2014
The Indecision Amalgamation
S7E19 / 03 Apr 2014
The Relationship Diremption
S7E20 / 10 Apr 2014
The Anything Can Happen Recurrence
S7E21 / 24 Apr 2014
The Proton Transmogrification
S7E22 / 01 May 2014
The Gorilla Dissolution
S7E23 / 08 May 2014
The Status Quo Combustion
S7E24 / 15 May 2014
Season 8
The Locomotion Interruption
S8E1 / 22 Sep 2014
The Junior Professor Solution
S8E2 / 22 Sep 2014
The First Pitch Insufficiency
S8E3 / 29 Sep 2014
The Hook-Up Reverberation
S8E4 / 06 Oct 2014
The Focus Attenuation
S8E5 / 13 Oct 2014
The Expedition Approximation
S8E6 / 20 Oct 2014
The Misinterpretation Agitation
S8E7 / 30 Oct 2014
The Prom Equivalency
S8E8 / 06 Nov 2014
The Septum Deviation
S8E9 / 13 Nov 2014
The Champagne Reflection
S8E10 / 20 Nov 2014
The Clean Room Infiltration
S8E11 / 11 Dec 2014
The Space Probe Disintegration
S8E12 / 08 Jan 2015
The Anxiety Optimization
S8E13 / 29 Jan 2015
The Troll Manifestation
S8E14 / 05 Feb 2015
The Comic Book Store Regeneration
S8E15 / 19 Feb 2015
The Intimacy Acceleration
S8E16 / 26 Feb 2015
The Colonization Application
S8E17 / 05 Mar 2015
The Leftover Thermalization
S8E18 / 12 Mar 2015
The Skywalker Incursion
S8E19 / 02 Apr 2015
The Fortification Implementation
S8E20 / 09 Apr 2015
The Communication Deterioration
S8E21 / 16 Apr 2015
The Graduation Transmission
S8E22 / 23 Apr 2015
The Maternal Combustion
S8E23 / 30 Apr 2015
The Commitment Determination
S8E24 / 07 May 2015
Season 9
The Matrimonial Momentum
S9E1 / 21 Sep 2015
The Separation Oscillation
S9E2 / 28 Sep 2015
The Bachelor Party Corrosion
S9E3 / 05 Oct 2015
The 2003 Approximation
S9E4 / 12 Oct 2015
The Perspiration Implementation
S9E5 / 19 Oct 2015
The Helium Insufficiency
S9E6 / 26 Oct 2015
The Spock Resonance
S9E7 / 05 Nov 2015
The Mystery Date Observation
S9E8 / 12 Nov 2015
The Platonic Permutation
S9E9 / 19 Nov 2015
The Earworm Reverberation
S9E10 / 10 Dec 2015
The Opening Night Excitation
S9E11 / 17 Dec 2015
The Sales Call Sublimation
S9E12 / 07 Jan 2016
The Empathy Optimization
S9E13 / 14 Jan 2016
The Meemaw Materialization
S9E14 / 04 Feb 2016
The Valentino Submergence
S9E15 / 11 Feb 2016
The Positive Negative Reaction
S9E16 / 18 Feb 2016
The Celebration Experimentation
S9E17 / 25 Feb 2016
The Application Deterioration
S9E18 / 10 Mar 2016
The Solder Excursion Diversion
S9E19 / 31 Mar 2016
The Big Bear Precipitation
S9E20 / 07 Apr 2016
The Viewing Party Combustion
S9E21 / 21 Apr 2016
The Fermentation Bifurcation
S9E22 / 28 Apr 2016
The Line Substitution Solution
S9E23 / 05 May 2016
The Convergence Convergence
S9E24 / 12 May 2016
Season 10
The Conjugal Conjecture
S10E1 / 19 Sep 2016
The Military Miniaturization
S10E2 / 26 Sep 2016
The Dependence Transcendence
S10E3 / 03 Oct 2016
The Cohabitation Experimentation
S10E4 / 10 Oct 2016
The Hot Tub Contamination
S10E5 / 17 Oct 2016
The Fetal Kick Catalyst
S10E6 / 27 Oct 2016
The Veracity Elasticity
S10E7 / 03 Nov 2016
The Brain Bowl Incubation
S10E8 / 10 Nov 2016
The Geology Elevation
S10E9 / 17 Nov 2016
The Property Division Collision
S10E10 / 01 Dec 2016
The Birthday Synchronicity
S10E11 / 15 Dec 2016
The Holiday Summation
S10E12 / 05 Jan 2017
The Romance Recalibration
S10E13 / 19 Jan 2017
The Emotion Detection Automation
S10E14 / 02 Feb 2017
The Locomotion Reverberation
S10E15 / 09 Feb 2017
The Allowance Evaporation
S10E16 / 16 Feb 2017
The Comic-Con Conundrum
S10E17 / 23 Feb 2017
The Escape Hatch Identification
S10E18 / 09 Mar 2017
The Collaboration Fluctuation
S10E19 / 30 Mar 2017
The Recollection Dissipation
S10E20 / 06 Apr 2017
The Separation Agitation
S10E21 / 13 Apr 2017
The Cognition Regeneration
S10E22 / 27 Apr 2017
The Gyroscopic Collapse
S10E23 / 04 May 2017
The Long Distance Dissonance
S10E24 / 11 May 2017
Season 11
The Proposal Proposal
S11E1 / 25 Sep 2017
The Retraction Reaction
S11E2 / 02 Oct 2017
The Relaxation Integration
S11E3 / 09 Oct 2017
The Explosion Implosion
S11E4 / 16 Oct 2017
The Collaboration Contamination
S11E5 / 23 Oct 2017
The Proton Regeneration
S11E6 / 02 Nov 2017
The Geology Methodology
S11E7 / 09 Nov 2017
The Tesla Recoil
S11E8 / 16 Nov 2017
The Bitcoin Entanglement
S11E9 / 30 Nov 2017
The Confidence Erosion
S11E10 / 07 Dec 2017
The Celebration Reverberation
S11E11 / 14 Dec 2017
The Matrimonial Metric
S11E12 / 04 Jan 2018
The Solo Oscillation
S11E13 / 11 Jan 2018
The Separation Triangulation
S11E14 / 18 Jan 2018
The Novelization Correlation
S11E15 / 01 Feb 2018
The Neonatal Nomenclature
S11E16 / 01 Mar 2018
The Athenaeum Allocation
S11E17 / 08 Mar 2018
The Gates Excitation
S11E18 / 29 Mar 2018
The Tenant Disassociation
S11E19 / 05 Apr 2018
The Reclusive Potential
S11E20 / 12 Apr 2018
The Comet Polarization
S11E21 / 19 Apr 2018
The Monetary Insufficiency
S11E22 / 26 Apr 2018
The Sibling Realignment
S11E23 / 03 May 2018
The Bow Tie Asymmetry
S11E24 / 10 May 2018
Season 12
The Conjugal Configuration
S12E1 / 24 Sep 2018
The Wedding Gift Wormhole
S12E2 / 27 Sep 2018
The Procreation Calculation
S12E3 / 04 Oct 2018
The Tam Turbulence
S12E4 / 11 Oct 2018
The Planetarium Collision
S12E5 / 18 Oct 2018
The Imitation Perturbation
S12E6 / 25 Oct 2018
The Grant Allocation Derivation
S12E7 / 01 Nov 2018
The Consummation Deviation
S12E8 / 08 Nov 2018
The Citation Negation
S12E9 / 15 Nov 2018
The VCR Illumination
S12E10 / 06 Dec 2018
The Paintball Scattering
S12E11 / 03 Jan 2019
The Propagation Proposition
S12E12 / 10 Jan 2019
The Confirmation Polarization
S12E13 / 17 Jan 2019
The Meteorite Manifestation
S12E14 / 31 Jan 2019
The Donation Oscillation
S12E15 / 07 Feb 2019
The D & D Vortex
S12E16 / 21 Feb 2019
The Conference Valuation
S12E17 / 07 Mar 2019
The Laureate Accumulation
S12E18 / 04 Apr 2019
The Inspiration Deprivation
S12E19 / 18 Apr 2019
The Decision Reverberation
S12E20 / 25 Apr 2019
The Plagiarism Schism
S12E21 / 02 May 2019
The Maternal Conclusion
S12E22 / 09 May 2019
The Change Constant / The Stockholm Syndrome
S12E23 / 16 May 2019
Unraveling the Mystery: A Big Bang Farewell
S12E24 / 16 May 2019
Johnny Galecki
Leonard Hofstadter
Jim Parsons
Sheldon Cooper
Kaley Cuoco
Penny
Simon Helberg
Howard Wolowitz
Kunal Nayyar
Rajesh Koothrappali
Melissa Rauch
Bernadette Rostenkowski
