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"The Guitarist Amplification" is the seventh episode of the third season of the American sitcom The Big Bang Theory. This episode first aired on Monday, November 9, 2009.

In this episode, Leonard and Penny have fight over her former boyfriend and guitarist will be sleeping on her couch while he is visiting, causing Sheldon to revisit his traumatic past when his parents fight.


Plot

Sheldon invented his own board game: Research Lab ("The Physics is Theoretical, But the Fun is Real!") Sheldon is using Penny and Leonard as beta testers playing the game with him. They quit because Penny has to pick up her friend Justin from the airport. Justin plays the guitar and has a lot of stuff. He will be crashing on her couch for a couple of weeks while he finds some recording studio time. Leonard is shocked and wonders how close of a friend he is. He and Penny went out once or twice, but were never serious. Leonard, her boyfriend, doesn't like him in her apartment. Sheldon wants to get back to the game. As their fight excessively heats up, Sheldon gets emotionally upset and goes over to the kitchen and turns on the sno-cone maker to drown out the argument. Penny gives up trying to talk over the blender and leaves, while Leonard has won the first game of "Research Lab," and a celebratory sno-cone.

Leonard is still complaining about Penny in his car on the way to work. Sheldon doesn't appear to be getting used to people fighting. Leonard keeps complaining, causing Sheldon to jump out of the car and walk.

With only have seventeen minutes for guys to get to the movies, they run into Penny, who hopes Leonard is ready to apologize. Leonard doesn't and Penny again reads him the riot act in front of Howard and Raj. Sheldon leaves.

Killing time before the next showing, they go to the comic book store. Howard agrees that Penny was out of line, but she'll probably have a new boyfriend by this time tomorrow. Leonard will have to build a new girlfriend. Raj thinks Leonard is wrong. He tells about the time he took a cooking class with Howard, but Howard blew him off to do a liquid cleansing diet with his mother. They start arguing about his mother which freaks Sheldon out, now rants over his parents' argument before he storms out.

Sheldon goes to the Cheesecake Factory supposedly to have lunch to ask Penny to apologize to Leonard. She's not doing that. Sheldon mentions several complaints Leonard has about her: her driving, the bed full of stuffed animals that stare at him during their "amorous activities," her tardiness, or her singing. This revelation ticks Penny off even more. Her message to Leonard is that he can drop dead!

Sheldon quickly goes home and suggests to Leonard to apologize to Penny before she gets back. Before Leonard could answer to Sheldon, Penny angrily comes in to yell at Leonard over the list that Sheldon detailed to her. Sheldon suddenly disappears from the apartment in the middle of the fight, causing both Leonard and Penny to find him, who are still arguing. Sheldon goes to Raj’s apartment who is having a fight with his parents over coming to New Delhi for Cousin Sanjay's wedding. Sheldon again leaves. He then rings the doorbell at Howard's house, but after overhearing Howard and his mother fighting, Sheldon leaves before Howard can answer the door.

After driving around, they find Sheldon at the comic book store where he made a nest according to Stuart. Leonard describes how he pretends to be in an alternate universe where Leonard and Penny don't exist. Sheldon comments that he shouldn't flatter himself because he is just ignoring them.) Leonard and Penny try to convince him they're done fighting.

Leonard and Penny still haven’t resolved the Justin issue, though Penny tells Sheldon that in a relationship and people sometimes fight, but that they will always love him. Still sounding like Sheldon’s parents they buy him a toy robot and a comic book so that he will come home. Leonard, sounding like his father, complains that he'll just play with it twice and it will end up in his closet.

Finally while Leonard and Penny have restored their relationship, Justin is asleep on Leonard’s couch right next to Sheldon, prompting Sheldon to say "I should have asked for much more than a comic book and a robot."

Trivia

  • Title Reference: Penny's visiting friend's occupation as a professional guitar player.
  • This is the first time, Sheldon makes a sno-cone without his Original Snoopy Snow-Cone Machine, which will appear in "The Irish Pub Formulation".


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Media
The Big Bang TheoryYoung SheldonVideo
Characters
Main Characters: Leonard HofstadterSheldon CooperPenny HofstadterHoward WolowitzRajesh KoothrappaliAmy Farrah FowlerBernadette Rostenkowski-WolowitzStuart BloomEmily SweeneyLeslie Winkle

Recurring Characters: Barry KripkeWil WheatonAltheaKurtEric GablehauserMary CooperDebbie WolowitzV.M. KoothrappaliMrs. KoothrappaliMikeStephanie BarnettBeverley HofstadterPresident SiebertZack JohnsonPriya KoothrappaliWyattMike RostenkowskiMrs. RostenkowskiAlex JensenJanine DavisLucyProfessor ProtonDavid GibbsClaireStephen HawkingColonel Richard Williams
Minor Characters: ChristyLalita GuptaToby LoobenfeldDennis KimDimitriMissy CooperBlainTomOctaviaMariaLourdesRamona NowitzkiKathy O'BrianDavid UnderhillAliciaMikaylaCaptain SweatpantsLonely LarryDr. CrawleyBethanySarahSkeeterProfessor LaughlinAbbyMarthaOfficer HackettSandyGlenVenkatesh KoothrappaliSebastianLouie/LouiseJoyce KimMrs. GundersonJoyMrs. FowlerAngela PageProfessor GlennMrs. LathamTodd ZarneckiColonel Richard Williams

Episodes
Season 1: PilotThe Big Bran HypothesisThe Fuzzy Boots CorollaryThe Luminous Fish EffectThe Hamburger PostulateThe Middle-Earth ParadigmThe Dumpling ParadoxThe Grasshopper ExperimentThe Cooper-Hofstadter PolarizationThe Loobenfeld DecayThe Pancake Batter AnomalyThe Jerusalem DualityThe Bat Jar ConjectureThe Nerdvana AnnihilationThe Porkchop IndeterminacyThe Peanut ReactionThe Tangerine Factor

Season 2: The Bad Fish ParadigmThe Codpiece TopologyThe Barbarian SublimationThe Griffin EquivalencyThe Euclid AlternativeThe Cooper-Nowitzki TheoremThe Panty Piñata PolarizationThe Lizard-Spock ExpansionThe White Asparagus TriangulationThe Vartabedian ConundrumThe Bath Item Gift HypothesisThe Killer Robot InstabilityThe Friendship AlgorithmThe Financial PermeabilityThe Maternal CapacitanceThe Cushion SaturationThe Terminator DecouplingThe Work Song NanoclusterThe Dead Hooker JuxtapositionThe Hofstadter IsotopeThe Vegas RenormalizationThe Classified Materials TurbulenceThe Monopolar Expedition
Season 3: The Electric Can Opener FluctuationThe Jiminy ConjectureThe Gothowitz DeviationThe Pirate SolutionThe Creepy Candy Coating CorollaryThe Cornhusker VortexThe Guitarist AmplificationThe Adhesive Duck DeficiencyThe Vengeance FormulationThe Gorilla ExperimentThe Maternal CongruenceThe Psychic VortexThe Bozeman ReactionThe Einstein ApproximationThe Large Hadron CollisionThe Excelsior AcquisitionThe Precious FragmentationThe Pants AlternativeThe Wheaton RecurrenceThe Spaghetti CatalystThe Plimpton StimulationThe Staircase ImplementationThe Lunar Excitation
Season 4: The Robotic ManipulationThe Cruciferous Vegetable AmplificationThe Zazzy SubstitutionThe Hot Troll DeviationThe Desperation EmanationThe Irish Pub FormulationThe Apology InsufficiencyThe 21-Second ExcitationThe Boyfriend ComplexityThe Alien Parasite HypothesisThe Justice League RecombinationThe Bus Pants UtilizationThe Love Car DisplacementThe Thespian CatalystThe Benefactor FactorThe Cohabitation FormulationThe Toast DerivationThe Prestidigitation ApproximationThe Zarnecki IncursionThe Herb Garden GerminationThe Agreement DissectionThe Wildebeest ImplementationThe Engagement ReactionThe Roommate Transmogrification
Season 5: The Skank Reflex AnalysisThe Infestation HypothesisThe Pulled Groin ExtrapolationThe Wiggly Finger CatalystThe Russian Rocket ReactionThe Rhinitis RevelationThe Good Guy FluctuationThe Isolation PermutationThe Ornithophobia DiffusionThe Flaming Spittoon AcquisitionThe Speckerman RecurrenceThe Shiny Trinket ManeuverThe Recombination HypothesisThe Beta Test InitiationThe Friendship ContractionThe Vacation SolutionThe Rothman DisintegrationThe Werewolf TransformationThe Weekend VortexThe Transporter MalfunctionThe Hawking ExcitationThe Stag ConvergenceThe Launch AccelerationThe Countdown Reflection
Season 6: The Date Night VariableThe Decoupling FluctuationThe Higgs Boson ObservationThe Re-Entry MinimizationThe Holographic ExcitationThe Extract ObliterationThe Habitation ConfigurationThe 43 PeculiarityThe Parking Lot EscalationThe Fish Guts DisplacementThe Santa SimulationThe Egg Salad EquivalencyThe Bakersfield ExpeditionThe Cooper/Kripke InversionThe Spoiler Alert SegmentationThe Tangible Affection ProofThe Monster IsolationThe Contractual Obligation ImplementationThe Closet ReconfigurationThe Tenure TurbulenceThe Closure AlternativeThe Proton ResurgenceThe Love Spell PotentialThe Bon Voyage Reaction
Season 7: The Hofstadter InsufficiencyThe Deception VerificationThe Scavenger VortexThe Raiders MinimizationThe Workplace ProximityThe Romance ResonanceThe Proton DisplacementThe Itchy Brain SimulationThe Thanksgiving DecouplingThe Discovery DissipationThe Cooper ExtractionThe Hesitation RamificationThe Occupation RecalibrationThe Convention ConundrumThe Locomotive ManipulationThe Table PolarizationThe Friendship TurbulenceThe Mommy ObservationThe Indecision AmalgamationThe Relationship DiremptionThe Anything Can Happen Thursday RecurrenceThe Proton TransmogrificationThe Gorilla DissolutionThe Status Quo Combustion
Season 8: The Locomotion InterruptionThe Junior Professor SolutionThe First Pitch InsufficiencyThe Hook-up ReverberationThe Focus AttenuationThe Expedition ApproximationThe Misinterpretation AgitationThe Prom EquivalencyThe Septum DeviationThe Champagne ReflectionThe Clean Room InfiltrationThe Space Probe DisintegrationThe Anxiety OptimizationThe Troll ManifestationThe Comic Book Store RegenerationThe Intimacy AccelerationThe Colonization ApplicationThe Leftover ThermalizationThe Skywalker IncursionThe Fortification ImplementationThe Communication DeteriorationThe Graduation TransmissionThe Maternal CombustionThe Commitment Determination
Season 9: The Matrimony MomentumThe Separation OscillationThe Bachelor Party CorrosionThe 2003 ApproximationThe Perspiration ImplementationThe Helium InsufficiencyThe Spock ResonanceThe Mystery Date ObservationThe Platonic PermutationThe Earworm ReverberationThe Opening Night ExcitationThe Sales Call SublimationThe Empathy OptimizationThe Meemaw MaterializationThe Valentino SubmergenceThe Positive Negative ReactionThe Celebration ExperimentationThe Application DeteriorationThe Solder Excursion DiversionThe Big Bear PrecipitationThe Viewing Party CombustionThe Fermentation BifurcationThe Line Substitution SolutionThe Convergence-Convergence
Season 10: The Conjugal ConjectureThe Military MiniaturizationThe Dependence TranscendenceThe Cohabitation ExperimentationThe Hot Tub ContaminationThe Fetal Kick CatalystThe Veracity ElasticityThe Brain Bowl IncubationThe Geology ElevationThe Property Division CollisionThe Birthday SynchronicityThe Holiday SummationThe Romance RecalibrationThe Emotion Detection AutomationThe Locomotion Reverberation

Locations
The Apartment BuildingApartment 4AApartment 4BThe ElevatorCalifornia Institute of TechnologyWolowitz HouseThe Comic Center of PasadenaPasadenaThe Cheesecake FactoryRaj's ApartmentAmy's ApartmentHoward and Bernadette's ApartmentThe StairsSheldon's Old OfficeRaj's Old OfficeSheldon's New OfficeHoward's LabThe University CafeteriaKripke's Plasma LabInternational Space StationThe Kinetics Lab
Songs
Transportations
See Also
Unaired Pilot