Rajesh Ramayan Koothrappali comes out of a very wealthy family from New Delhi, India. He also is a PhD and works as a particle astrophysicist at Caltech. He is a very shy character and only interacts with women after he drinks alcohol or similar substances.
Appearances
The Big Bang Theory
Main cast, played by Kunal Nayyar
- Episode 1x01: Pilot (Sep 24, 2007)
- Episode 1x02: The Big Bran Hypothesis (Oct 1, 2007)
- Episode 1x03: The Fuzzy Boots Corollary (Oct 8, 2007)
- Episode 1x04: The Luminous Fish Effect (Oct 15, 2007)
- Episode 1x05: The Hamburger Postulate (Oct 22, 2007)
- Episode 1x06: The Middle-Earth Paradigm (Oct 29, 2007)
- Episode 1x07: The Dumpling Paradox (Nov 5, 2007)
- Episode 1x08: The Grasshopper Experiment (Nov 12, 2007)
- Episode 1x09: The Cooper-Hofstadter Polarization (Mar 17, 2008)
- Episode 1x10: The Loobenfeld Decay (Mar 24, 2008)
- Episode 1x11: The Pancake Batter Anomaly (Mar 31, 2008)
- Episode 1x12: The Jerusalem Duality (Apr 14, 2008)
- Episode 1x13: The Bat Jar Conjecture (Apr 21, 2008)
- Episode 1x14: The Nerdvana Annihilation (Apr 28, 2008)
- Episode 1x15: The Pork Chop Indeterminacy (May 5, 2008)
- Episode 1x16: The Peanut Reaction (May 12, 2008)
- Episode 1x17: The Tangerine Factor (May 19, 2008)
- Episode 2x01: The Bad Fish Paradigm (Sep 22, 2008)
- Episode 2x02: The Codpiece Topology (Sep 29, 2008)
- Episode 2x03: The Barbarian Sublimation (Oct 6, 2008)
- Episode 2x04: The Griffin Equivalency (Oct 13, 2008)
- Episode 2x05: The Euclid Alternative (Oct 20, 2008)
- Episode 2x06: The Cooper-Nowitzki Theorem (Nov 3, 2008)
- Episode 2x07: The Panty Piñata Polarization (Nov 10, 2008)
- Episode 2x08: The Lizard-Spock Expansion (Nov 17, 2008)
- Episode 2x09: The White Asparagus Triangulation (Nov 24, 2008)
- Episode 2x10: The Vartabedian Conundrum (Dec 8, 2008)
- Episode 2x11: The Bath Item Gift Hypothesis (Dec 15, 2008)
- Episode 2x12: The Killer Robot Instability (Jan 12, 2009)
- Episode 2x13: The Friendship Algorithm (Jan 19, 2009)
- Episode 2x14: The Financial Permeability (Feb 2, 2009)
- Episode 2x15: The Maternal Capacitance (Feb 9, 2009)
- Episode 2x16: The Cushion Saturation (Mar 2, 2009)
- Episode 2x17: The Terminator Decoupling (Mar 9, 2009)
- Episode 2x18: The Work Song Nanocluster (Mar 16, 2009)
- Episode 2x19: The Dead Hooker Juxtaposition (Mar 30, 2009)
- Episode 2x20: The Hofstadter Isotope (Apr 13, 2009)
- Episode 2x21: The Vegas Renormalization (Apr 27, 2009)
- Episode 2x22: The Classified Materials Turbulence (May 4, 2009)
- Episode 2x23: The Monopolar Expedition (May 11, 2009)
- Episode 3x01: The Electric Can Opener Fluctuation (Sep 21, 2009)
- Episode 3x02: The Jiminy Conjecture (Sep 28, 2009)
- Episode 3x03: The Gothowitz Deviation (Oct 5, 2009)
- Episode 3x04: The Pirate Solution (Oct 12, 2009)
- Episode 3x05: The Creepy Candy Coating Corollary (Oct 19, 2009)
- Episode 3x06: The Cornhusker Vortex (Nov 2, 2009)
- Episode 3x07: The Guitarist Amplification (Nov 9, 2009)
- Episode 3x08: The Adhesive Duck Deficiency (Nov 16, 2009)
- Episode 3x09: The Vengeance Formulation (Nov 23, 2009)
- Episode 3x10: The Gorilla Experiment (Dec 7, 2009)
- Episode 3x11: The Maternal Congruence (Dec 14, 2009)
- Episode 3x12: The Psychic Vortex (Jan 11, 2010)
- Episode 3x13: The Bozeman Reaction (Jan 18, 2010)
- Episode 3x14: The Einstein Approximation (Feb 1, 2010)
- Episode 3x15: The Large Hadron Collision (Feb 8, 2010)
- Episode 3x16: The Excelsior Acquisition (Mar 1, 2010)
- Episode 3x17: The Precious Fragmentation (Mar 8, 2010)
- Episode 3x18: The Pants Alternative (Mar 22, 2010)
- Episode 3x19: The Wheaton Recurrence (Apr 12, 2010)
- Episode 3x20: The Spaghetti Catalyst (May 3, 2010)
- Episode 3x21: The Plimpton Stimulation (May 10, 2010)
- Episode 3x22: The Staircase Implementation (May 17, 2010)
- Episode 3x23: The Lunar Excitation (May 24, 2010)
- Episode 4x01: The Robotic Manipulation (Sep 23, 2010)
- Episode 4x02: The Cruciferous Vegetable Amplification (Sep 30, 2010)
- Episode 4x03: The Zazzy Substitution (Oct 7, 2010)
- Episode 4x04: The Hot Troll Deviation (Oct 14, 2010)
- Episode 4x05: The Desperation Emanation (Oct 21, 2010)
- Episode 4x06: The Irish Pub Formulation (Oct 28, 2010)
- Episode 4x07: The Apology Insufficiency (Nov 4, 2010)
- Episode 4x08: The 21-Second Excitation (Nov 11, 2010)
- Episode 4x09: The Boyfriend Complexity (Nov 18, 2010)
- Episode 4x10: The Alien Parasite Hypothesis (Dec 9, 2010)
- Episode 4x11: The Justice League Recombination (Dec 16, 2010)
- Episode 4x12: The Bus Pants Utilization (Jan 6, 2011)
- Episode 4x13: The Love Car Displacement (Jan 20, 2011)
- Episode 4x14: The Thespian Catalyst (Feb 3, 2011)
- Episode 4x15: The Benefactor Factor (Feb 10, 2011)
- Episode 4x16: The Cohabitation Formulation (Feb 17, 2011)
- Episode 4x17: The Toast Derivation (Feb 24, 2011)
- Episode 4x18: The Prestidigitation Approximation (Mar 10, 2011)
- Episode 4x19: The Zarnecki Incursion (Mar 31, 2011)
- Episode 4x20: The Herb Garden Germination (Apr 7, 2011)
- Episode 4x21: The Agreement Dissection (Apr 28, 2011)
- Episode 4x22: The Wildebeest Implementation (May 5, 2011)
- Episode 4x23: The Engagement Reaction (May 12, 2011)
- Episode 4x24: The Roommate Transmogrification (May 19, 2011)
- Episode 5x01: The Skank Reflex Analysis (Sep 22, 2011)
- Episode 5x02: The Infestation Hypothesis (Sep 22, 2011)
- Episode 5x03: The Pulled Groin Extrapolation (Sep 29, 2011)
- Episode 5x04: The Wiggly Finger Catalyst (Oct 6, 2011)
- Episode 5x05: The Russian Rocket Reaction (Oct 13, 2011)
- Episode 5x06: The Rhinitis Revelation (Oct 20, 2011)
- Episode 5x07: The Good Guy Fluctuation (Oct 27, 2011)
- Episode 5x08: The Isolation Permutation (Nov 3, 2011)
- Episode 5x09: The Ornithophobia Diffusion (Nov 10, 2011)
- Episode 5x10: The Flaming Spittoon Acquisition (Nov 17, 2011)
- Episode 5x11: The Speckerman Recurrence (Dec 8, 2011)
- Episode 5x12: The Shiny Trinket Maneuver (Jan 12, 2012)
- Episode 5x13: The Recombination Hypothesis (Jan 19, 2012)
- Episode 5x14: The Beta Test Initiation (Jan 26, 2012)
- Episode 5x15: The Friendship Contraction (Feb 2, 2012)
- Episode 5x16: The Vacation Solution (Feb 9, 2012)
- Episode 5x17: The Rothman Disintegration (Feb 16, 2012)
- Episode 5x18: The Werewolf Transformation (Feb 23, 2012)
- Episode 5x19: The Weekend Vortex (Mar 8, 2012)
- Episode 5x20: The Transporter Malfunction (Mar 29, 2012)
- Episode 5x21: The Hawking Excitation (Apr 5, 2012)
- Episode 5x22: The Stag Convergence (Apr 26, 2012)
- Episode 5x23: The Launch Acceleration (May 3, 2012)
- Episode 5x24: The Countdown Reflection (May 10, 2012)
- Episode 6x01: The Date Night Variable (Sep 27, 2012)
- Episode 6x02: The Decoupling Fluctuation (Oct 4, 2012)
- Episode 6x03: The Higgs Boson Observation (Oct 11, 2012)
- Episode 6x04: The Re-Entry Minimization (Oct 18, 2012)
- Episode 6x05: The Holographic Excitation (Oct 25, 2012)
- Episode 6x06: The Extract Obliteration (Nov 1, 2012)
- Episode 6x07: The Habitation Configuration (Nov 8, 2012)
- Episode 6x08: The 43 Peculiarity (Nov 15, 2012)
- Episode 6x09: The Parking Spot Escalation (Nov 29, 2012)
- Episode 6x10: The Fish Guts Displacement (Dec 6, 2012)
- Episode 6x11: The Santa Simulation (Dec 13, 2012)
- Episode 6x12: The Egg Salad Equivalency (Jan 3, 2013)
- Episode 6x13: The Bakersfield Expedition (Jan 10, 2013)
- Episode 6x14: The Cooper/Kripke Inversion (Jan 31, 2013)
- Episode 6x15: The Spoiler Alert Segmentation (Feb 7, 2013)
- Episode 6x16: The Tangible Affection Proof (Feb 14, 2013)
- Episode 6x17: The Monster Isolation (Feb 21, 2013)
- Episode 6x18: The Contractual Obligation Implementation (Mar 7, 2013)
- Episode 6x19: The Closet Reconfiguration (Mar 14, 2013)
- Episode 6x20: The Tenure Turbulence (Apr 4, 2013)
- Episode 6x21: The Closure Alternative (Apr 25, 2013)
- Episode 6x22: The Proton Resurgence (May 2, 2013)
- Episode 6x23: The Love Spell Potential (May 9, 2013)
- Episode 6x24: The Bon Voyage Reaction (May 16, 2013)
- Episode 7x01: The Hofstadter Insufficiency (Sep 26, 2013)
- Episode 7x02: The Deception Verification (Sep 26, 2013)
- Episode 7x03: The Scavenger Vortex (Oct 3, 2013)
- Episode 7x04: The Raiders Minimization (Oct 10, 2013)
- Episode 7x05: The Workplace Proximity (Oct 17, 2013)
- Episode 7x06: The Romance Resonance (Oct 24, 2013)
- Episode 7x07: The Proton Displacement (Nov 7, 2013)
- Episode 7x08: The Itchy Brain Simulation (Nov 14, 2013)
- Episode 7x09: The Thanksgiving Decoupling (Nov 21, 2013)
- Episode 7x10: The Discovery Dissipation (Dec 5, 2013)
- Episode 7x11: The Cooper Extraction (Dec 12, 2013)
- Episode 7x12: The Hesitation Ramification (Jan 2, 2014)
- Episode 7x13: The Occupation Recalibration (Jan 9, 2014)
- Episode 7x14: The Convention Conundrum (Jan 30, 2014)
- Episode 7x15: The Locomotive Manipulation (Feb 6, 2014)
- Episode 7x16: The Table Polarization (Feb 27, 2014)
- Episode 7x17: The Friendship Turbulence (Mar 6, 2014)
- Episode 7x18: The Mommy Observation (Mar 13, 2014)
- Episode 7x19: The Indecision Amalgamation (Apr 3, 2014)
- Episode 7x20: The Relationship Diremption (Apr 10, 2014)
- Episode 7x21: The Anything Can Happen Recurrence (Apr 24, 2014)
- Episode 7x22: The Proton Transmogrification (May 1, 2014)
- Episode 7x23: The Gorilla Dissolution (May 8, 2014)
- Episode 7x24: The Status Quo Combustion (May 15, 2014)
- Episode 8x01: The Locomotion Interruption (Sep 22, 2014)
- Episode 8x02: The Junior Professor Solution (Sep 22, 2014)
- Episode 8x03: The First Pitch Insufficiency (Sep 29, 2014)
- Episode 8x04: The Hook-Up Reverberation (Oct 6, 2014)
- Episode 8x05: The Focus Attentuation (Oct 13, 2014)
- Episode 8x06: The Expedition Approximation (Oct 20, 2014)
- Episode 8x07: The Misinterpretation Agitation (Oct 30, 2014)
- Episode 8x08: The Prom Equivalency (Nov 6, 2014)
- Episode 8x09: The Septum Deviation (Nov 13, 2014)
- Episode 8x10: The Champagne Reflection (Nov 20, 2014)
- Episode 8x11: The Clean Room Infiltration (Dec 11, 2014)
- Episode 8x12: The Space Probe Disintegration (Jan 8, 2015)
- Episode 8x13: The Anxiety Optimization (Jan 29, 2015)
- Episode 8x14: The Troll Manifestation (Feb 5, 2015)
- Episode 8x15: The Comic Book Store Regeneration (Feb 19, 2015)
- Episode 8x16: The Intimacy Acceleration (Feb 26, 2015)
- Episode 8x17: The Colonization Application (Mar 5, 2015)
- Episode 8x18: The Leftover Thermalization (Mar 12, 2015)
- Episode 8x19: The Skywalker Incursion (Apr 2, 2015)
- Episode 8x20: The Fortification Implementation (Apr 9, 2015)
- Episode 8x21: The Communication Deterioration (Apr 16, 2015)
- Episode 8x22: The Graduation Transmission (Apr 23, 2015)
- Episode 8x23: The Maternal Combustion (Apr 30, 2015)
- Episode 8x24: The Commitment Determination (May 7, 2015)
- Episode 9x01: The Matrimonial Momentum (Sep 21, 2015)
- Episode 9x02: The Separation Oscillation (Sep 28, 2015)
- Episode 9x03: The Bachelor Party Corrosion (Oct 5, 2015)
- Episode 9x04: The 2003 Approximation (Oct 12, 2015)
- Episode 9x05: The Perspiration Implementation (Oct 19, 2015)
- Episode 9x06: The Helium Insufficiency (Oct 26, 2015)
- Episode 9x07: The Spock Resonance (Nov 5, 2015)
- Episode 9x08: The Mystery Date Observation (Nov 12, 2015)
- Episode 9x09: The Platonic Permutation (Nov 19, 2015)
- Episode 9x10: The Earworm Reverberation (Dec 10, 2015)
- Episode 9x11: The Opening Night Excitation (Dec 17, 2015)
- Episode 9x12: The Sales Call Sublimation (Jan 7, 2016)
- Episode 9x13: The Empathy Optimization (Jan 14, 2016)
- Episode 9x14: The Meemaw Materialization (Feb 4, 2016)
- Episode 9x15: The Valentino Submergence (Feb 11, 2016)
- Episode 9x16: The Positive Negative Reaction (Feb 18, 2016)
- Episode 9x17: The Celebration Experimentation (Feb 25, 2016)
- Episode 9x18: The Application Deterioration (Mar 10, 2016)
- Episode 9x19: The Solder Excursion Diversion (Mar 31, 2016)
- Episode 9x20: The Big Bear Precipitation (Apr 7, 2016)
- Episode 9x21: The Viewing Party Combustion (Apr 21, 2016)
- Episode 9x22: The Fermentation Bifurcation (Apr 28, 2016)
- Episode 9x23: The Line Substitution Solution (May 5, 2016)
- Episode 9x24: The Convergence Convergence (May 12, 2016)
- Episode 10x01: The Conjugal Conjecture (Sep 19, 2016)
- Episode 10x02: The Military Miniaturization (Sep 26, 2016)
- Episode 10x03: The Dependence Transcendence (Oct 3, 2016)
- Episode 10x04: The Cohabitation Experimentation (Oct 10, 2016)
- Episode 10x05: The Hot Tub Contamination (Oct 17, 2016)
- Episode 10x06: The Fetal Kick Catalyst (Oct 27, 2016)
- Episode 10x07: The Veracity Elasticity (Nov 3, 2016)
- Episode 10x08: The Brain Bowl Incubation (Nov 10, 2016)
- Episode 10x09: The Geology Elevation (Nov 17, 2016)
- Episode 10x10: The Property Division Collision (Dec 1, 2016)
- Episode 10x11: The Birthday Synchronicity (Dec 15, 2016)
- Episode 10x12: The Holiday Summation (Jan 5, 2017)
- Episode 10x13: The Romance Recalibration (Jan 19, 2017)
- Episode 10x14: The Emotion Detection Automation (Feb 2, 2017)
- Episode 10x15: The Locomotion Reverberation (Feb 9, 2017)
- Episode 10x16: The Allowance Evaporation (Feb 16, 2017)
- Episode 10x17: The Comic-Con Conundrum (Feb 23, 2017)
- Episode 10x18: The Escape Hatch Identification (Mar 9, 2017)
- Episode 10x19: The Collaboration Fluctuation (Mar 30, 2017)
- Episode 10x20: The Recollection Dissipation (Apr 6, 2017)
- Episode 10x21: The Separation Agitation (Apr 13, 2017)
- Episode 10x22: The Cognition Regeneration (Apr 27, 2017)
- Episode 10x23: The Gyroscopic Collapse (May 4, 2017)
- Episode 10x24: The Long Distance Dissonance (May 11, 2017)
- Episode 11x01: The Proposal Proposal (Sep 25, 2017)
- Episode 11x02: The Retraction Reaction (Oct 2, 2017)
- Episode 11x03: The Relaxation Integration (Oct 9, 2017)
- Episode 11x04: The Explosion Implosion (Oct 16, 2017)
- Episode 11x05: The Collaboration Contamination (Oct 23, 2017)
- Episode 11x06: The Proton Regeneration (Nov 2, 2017)
- Episode 11x07: The Geology Methodology (Nov 9, 2017)
- Episode 11x08: The Tesla Recoil (Nov 16, 2017)
- Episode 11x09: The Bitcoin Entanglement (Nov 30, 2017)
- Episode 11x10: The Confidence Erosion (Dec 7, 2017)
- Episode 11x11: The Celebration Reverberation (Dec 14, 2017)
- Episode 11x12: The Matrimonial Metric (Jan 4, 2018)
- Episode 11x13: The Solo Oscillation (Jan 11, 2018)
- Episode 11x14: The Separation Triangulation (Jan 18, 2018)
- Episode 11x15: The Novelization Correlation (Feb 1, 2018)
- Episode 11x16: The Neonatal Nomenclature (Mar 1, 2018)
- Episode 11x17: The Athenaeum Allocation (Mar 8, 2018)
- Episode 11x18: The Gates Excitation (Mar 29, 2018)
- Episode 11x19: The Tenant Disassociation (Apr 5, 2018)
- Episode 11x20: The Reclusive Potential (Apr 12, 2018)
- Episode 11x21: The Comet Polarization (Apr 19, 2018)
- Episode 11x22: The Monetary Insufficiency (Apr 26, 2018)
- Episode 11x23: The Sibling Realignment (May 3, 2018)
- Episode 11x24: The Bow Tie Asymmetry (May 10, 2018)
- Episode 12x01: The Conjugal Configuration (Sep 24, 2018)
- Episode 12x02: The Wedding Gift Wormhole (Sep 27, 2018)
- Episode 12x03: The Procreation Calculation (Oct 4, 2018)
- Episode 12x04: The Tam Turbulence (Oct 11, 2018)
- Episode 12x05: The Planetarium Collision (Oct 18, 2018)
- Episode 12x06: The Imitation Perturbation (Oct 25, 2018)
- Episode 12x07: The Grant Allocation Derivation (Nov 1, 2018)
- Episode 12x08: The Consummation Deviation (Nov 8, 2018)
- Episode 12x09: The Citation Negation (Nov 15, 2018)
- Episode 12x10: The VCR Illumination (Dec 6, 2018)
- Episode 12x11: The Paintball Scattering (Jan 3, 2019)
- Episode 12x12: The Propagation Proposition (Jan 10, 2019)
- Episode 12x13: The Confirmation Polarization (Jan 17, 2019)
- Episode 12x14: The Meteorite Manifestation (Jan 31, 2019)
- Episode 12x15: The Donation Oscillation (Feb 7, 2019)
- Episode 12x16: The D&D Vortex (Feb 21, 2019)
- Episode 12x17: The Conference Valuation (Mar 7, 2019)
- Episode 12x18: The Laureate Accumulation (Apr 4, 2019)
- Episode 12x19: The Inspiration Deprivation (Apr 18, 2019)
- Episode 12x20: The Decision Reverberation (Apr 25, 2019)
- Episode 12x21: The Plagiarism Schism (May 2, 2019)
- Episode 12x22: The Maternal Conclusion (May 9, 2019)
- Episode 12x23: The Change Constant (May 16, 2019)
- Episode 12x24: The Stockholm Syndrome (May 16, 2019)