The Big Bang Theory

Watch Online The Big Bang Theory at Xtvseries Leonard Hofstadter, PhD – An experimental physicist with an IQ of 173, he received his PhD when he was 24 years old. His mother, Dr. Beverly Hofstadter (Christine Baranski), is a neuroscientist and psychiatrist who provided little, if any, nurturing when Leonard was growing up. Like all of the other major male characters, he is a nerd who loves video games, comic books and Dungeons & Dragons. The straight man of the series, he shares an apartment in Pasadena with colleague and friend Sheldon Cooper. Leonard is smitten with his neighbour Penny when they first meet.

Episode List

Season 9

    The Big Bang Theory Season 9 Episode 16 – The Positive Negative Reaction
    The Big Bang Theory Season 9 Episode 15 – The Valentino Submergence
    The Big Bang Theory Season 9 Episode 14 – The Meemaw Materialization
    The Big Bang Theory Season 9 Episode 13 – The Empathy Optimization
    The Big Bang Theory Season 9 Episode 12 – The Sales Call Sublimation
    The Big Bang Theory Season 9 Episode 11 – The Opening Night Excitation
    The Big Bang Theory Season 9 Episode 10 – The Earworm Reverberation
    The Big Bang Theory Season 9 Episode 9 – The Platonic Permutation
    The Big Bang Theory Season 9 Episode 8 – The Mystery Date Observation
    The Big Bang Theory Season 9 Episode 7 – The Helium Insufficiency
    The Big Bang Theory Season 9 Episode 6 – The Spock Resonance
    The Big Bang Theory Season 9 Episode 5 – The Perspiration Implementation
    The Big Bang Theory Season 9 Episode 4 – The 23 Approximation
    The Big Bang Theory Season 9 Episode 3 – The Bachelor Party Corrosion
    The Big Bang Theory Season 9 Episode 2 – The Separation Oscillation
    The Big Bang Theory Season 9 Episode 1 – The Matrimony Momentum
    The Big Bang Theory Season 9 Episode 00 – 2015 Comic Con Panel

Season 8

    The Big Bang Theory Season 8 Episode 24 – The Commitment Determination
    The Big Bang Theory Season 8 Episode 23 – The Maternal Combustion
    The Big Bang Theory Season 8 Episode 22 – The Graduation Transmission
    The Big Bang Theory S8 Episode 21 – The Communication Deterioration
    The Big Bang Theory S8 Episode 20 – The Fortification Implementation
    The Big Bang Theory S8 Episode 19 – The Skywalker Incursion
    The Big Bang Theory S8 Episode 18 – The Leftover Thermalization
    The Big Bang Theory S8 Episode 17 – The Colonization Application
    The Big Bang Theory S8 Episode 16 – The Intimacy Acceleration
    The Big Bang Theory S8 Episode 15 – The Comic Book Store Regeneration
    The Big Bang Theory S8 Episode 14 – The Troll Manifestation
    The Big Bang Theory S8 Episode 13 – The Anxiety Optimization
    The Big Bang Theory S8 Episode 12 – The Space Probe Disintegration
    The Big Bang Theory S8 Episode 11 – The Clean Room Infiltration
    The Big Bang Theory S8 Episode 10 – The Champagne Reflection
    The Big Bang Theory S8 Episode 9 – The Septum Deviation
    The Big Bang Theory S8 Episode 8 – The Prom Equivalency
    The Big Bang Theory S8 Episode 7 – The Prom Equivalency
    The Big Bang Theory S8 Episode 6 – The Expedition Approximation
    The Big Bang Theory S8 Episode 5 – The Focus Attenuation
    The Big Bang Theory S8 Episode 4 – The Hook-up Reverberation
    The Big Bang Theory S8 Episode 3 – The First Pitch Insufficiency
    The Big Bang Theory S8 Episode 2 – The Junior Professor Solution
    The Big Bang Theory S8 Episode 1 – The Locomotion Interruption

Season 7

    The Big Bang Theory S7 Episode 24 – The Status Quo Combustion
    The Big Bang Theory S7 Episode 23 – The Gorilla Dissolution
    The Big Bang Theory S7 Episode 22 – The Proton Transmogrification
    The Big Bang Theory S7 Episode 21 – The Anything Can Happen Recurrence
    The Big Bang Theory S7 Episode 20 – The Relationship Diremption
    The Big Bang Theory S7 Episode 19 – The Indecision Amalgamation
    The Big Bang Theory S7 Episode 18 – The Mommy Observation
    The Big Bang Theory S7 Episode 17 – The Friendship Turbulence
    The Big Bang Theory S7 Episode 16 – The Table Polarization
    The Big Bang Theory S7 Episode 15 – The Locomotive Manipulation
    The Big Bang Theory S7 Episode 14 – The Convention Conundrum
    The Big Bang Theory S7 Episode 13 – The Occupation Recalibration
    The Big Bang Theory S7 Episode 12 – The Hesitation Ramification
    The Big Bang Theory S7 Episode 11 – The Cooper Extraction
    The Big Bang Theory S7 Episode 10 – The Discovery Dissipation
    The Big Bang Theory S7 Episode 9 – The Thanksgiving Decoupling
    The Big Bang Theory S7 Episode 8 – The Itchy Brain Simulation
    The Big Bang Theory S7 Episode 7 – The Proton Displacement
    The Big Bang Theory S7 Episode 6 – The Romance Resonance
    The Big Bang Theory S7 Episode 5 – The Workplace Proximity
    The Big Bang Theory S7 Episode 4 – The Raiders Minimization
    The Big Bang Theory S7 Episode 3 – The Scavenger Vortex
    The Big Bang Theory S7 Episode 2 – The Deception Verification
    The Big Bang Theory S7 Episode 1 – The Hofstadter Insufficiency

Season 6

    The Big Bang Theory S6 Episode 24 – The Bon Voyage Reaction
    The Big Bang Theory S6 Episode 23 – The Love Spell Potential
    The Big Bang Theory S6 Episode 22 – The Proton Resurgence
    The Big Bang Theory S6 Episode 21 – The Closure Alternative
    The Big Bang Theory S6 Episode 20 – The Tenure Turbulence
    The Big Bang Theory S6 Episode 19 – The Closet Reconfiguration
    The Big Bang Theory S6 Episode 18 – The Contractual Obligation
    The Big Bang Theory S6 Episode 17 – The Monster Isolation
    The Big Bang Theory S6 Episode 16 – The Tangible Affection Proof
    The Big Bang Theory S6 Episode 15 – The Spoiler Alert Segmentation
    The Big Bang Theory S6 Episode 14 – The Cooper/Kripke Inversion
    The Big Bang Theory S6 Episode 13 – The Bakersfield Expedition
    The Big Bang Theory S6 Episode 12 – The Egg Salad Equivalency
    The Big Bang Theory S6 Episode 11 – The Santa Simulation
    The Big Bang Theory S6 Episode 10 – The Fish Guts Displacement
    The Big Bang Theory S6 Episode 9 – The Parking Spot Escalation
    The Big Bang Theory S6 Episode 8 – The 43 Peculiarity
    The Big Bang Theory S6 Episode 7 – The Habitation Configuration
    The Big Bang Theory S6 Episode 6 – The Extract Obliteration
    The Big Bang Theory S6 Episode 5 – The Holographic Excitation
    The Big Bang Theory S6 Episode 4 – The Re-Entry Minimization
    The Big Bang Theory S6 Episode 3 – The Higgs Boson Observation
    The Big Bang Theory S6 Episode 2 – The Decoupling Fluctuation
    The Big Bang Theory S6 Episode 1 – The Date Night Variable

Season 5

    The Big Bang Theory S5 Episode 24 – The Countdown Reflection
    The Big Bang Theory S5 Episode 23 – The Launch Acceleration
    The Big Bang Theory S5 Episode 22 – The Stag Convergence
    The Big Bang Theory S5 Episode 21 – The Hawking Excitation
    The Big Bang Theory S5 Episode 20 – The Transporter Malfunction
    The Big Bang Theory S5 Episode 19 – The Weekend Vortex
    The Big Bang Theory S5 Episode 18 – The Werewolf Transformation
    The Big Bang Theory S5 Episode 17 – The Rothman Disintegration
    The Big Bang Theory S5 Episode 16 – The Vacation Solution
    The Big Bang Theory S5 Episode 15 – The Friendship ContractionThe
    The Big Bang Theory S5 Episode 14 – The Beta Test Initiation
    The Big Bang Theory S5 Episode 13 – The Recombination Hypothesis
    The Big Bang Theory S5 Episode 12 – The Shiny Trinket Maneuver
    The Big Bang Theory S5 Episode 11 – The Speckerman Recurrence
    The Big Bang Theory S5 Episode 10 – The Flaming Spittoon Acquisition
    The Big Bang Theory S5 Episode 9 – The Ornithophobia Diffusion
    The Big Bang Theory S5 Episode 8 – The Isolation Permutation
    The Big Bang Theory S5 Episode 7 – The Good Guy Fluctuation
    The Big Bang Theory S5 Episode 6 – The Rhinitis Revelation
    The Big Bang Theory S5 Episode 5 – The Russian Rocket Reaction
    The Big Bang Theory S5 Episode 4 – The Wiggly Finger Catalyst
    The Big Bang Theory S5 Episode 3 – The Pulled Groin Extrapolation
    The Big Bang Theory S5 Episode 2 – The Infestation Hypothesis
    The Big Bang Theory S5 Episode 1 – The Skank Reflex Analysis

Season 4

    The Big Bang Theory S4 Episode 24 – The Roommate Transmogrification
    The Big Bang Theory S4 Episode 23 – The Engagement Reaction
    The Big Bang Theory S4 Episode 22 – The Wildebeest Implementation
    The Big Bang Theory S4 Episode 21 – The Agreement Dissection
    The Big Bang Theory S4 Episode 20 – The Herb Garden Germination
    The Big Bang Theory S4 Episode 19 – The Zarnecki Incursion
    The Big Bang Theory S4 Episode 18 – The Prestidigitation Approximation
    The Big Bang Theory S4 Episode 17 – The Toast Derivation
    The Big Bang Theory S4 Episode 16 – The Cohabitation Formulation
    The Big Bang Theory S4 Episode 15 – The Benefactor Factor
    The Big Bang Theory S4 Episode 14 – The Thespian Catalyst
    The Big Bang Theory S4 Episode 13 – The Love Car Displacement
    The Big Bang Theory S4 Episode 12 – The Bus Pants Utilization
    The Big Bang Theory S4 Episode 11 – The Justice League Recombination
    The Big Bang Theory S4 Episode 10 – The Alien Parasite Hypothesis
    The Big Bang Theory S4 Episode 9 – The Boyfriend Complexity
    The Big Bang Theory S4 Episode 8 – The 21-Second Excitation
    The Big Bang Theory S4 Episode 7 – The Apology Insufficiency
    The Big Bang Theory S4 Episode 6 – The Irish Pub Formulation
    The Big Bang Theory S4 Episode 5 – The Desperation Emanation
    The Big Bang Theory S4 Episode 4 – The Hot Troll Deviation
    The Big Bang Theory S4 Episode 3 – The Zazzy Substitution
    The Big Bang Theory S4 Episode 2 – The Cruciferous Vegetable
    The Big Bang Theory S4 Episode 1 – The Robotic Manipulation

Season 3

    The Big Bang Theory S3 Episode 23 – The Lunar Excitation
    The Big Bang Theory S3 Episode 22 – The Staircase Implementation
    The Big Bang Theory S3 Episode 21 – The Plimpton Stimulation
    The Big Bang Theory S3 Episode 20 – The Spaghetti Catalyst
    The Big Bang Theory S3 Episode 19 – The Wheaton Recurrence
    The Big Bang Theory S3 Episode 18 – The Pants Alternative
    The Big Bang Theory S3 Episode 17 – The Precious Fragmentation
    The Big Bang Theory S3 Episode 16 – The Excelsior Acquisition
    The Big Bang Theory S3 Episode 15 – The Large Hadron Collision
    The Big Bang Theory S3 Episode 14 – The Einstein Approximation
    The Big Bang Theory S3 Episode 13 – The Bozeman Reaction
    The Big Bang Theory S3 Episode 12 – The Psychic Vortex
    The Big Bang Theory S3 Episode 11 – The Maternal Congruence
    The Big Bang Theory S3 Episode 10 – The Gorilla Experiment
    The Big Bang Theory S3 Episode 9 – The Vengeance Formulation
    The Big Bang Theory S3 Episode 8 – The Adhesive Duck Deficiency
    The Big Bang Theory S3 Episode 7 – The Guitarist Amplification
    The Big Bang Theory S3 Episode 6 – The Cornhusker Vortex
    The Big Bang Theory S3 Episode 5 – The Creepy Candy Coating Corollary
    The Big Bang Theory S3 Episode 4 – The Pirate Solution
    The Big Bang Theory S3 Episode 3 – The Gothowitz Deviation
    The Big Bang Theory S3 Episode 2 – The Jiminy Conjecture
    The Big Bang Theory S3 Episode 1 – The Electric Can Opener Fluctuation

Season 2

    The Big Bang Theory S2 Episode 23 – The Monopolar Expedition
    The Big Bang Theory S2 Episode 22 – The Classified Materials Turbulence
    The Big Bang Theory S2 Episode 21 – The Vegas Renormalization
    The Big Bang Theory S2 Episode 20 – The Hofstadter Isotope
    The Big Bang Theory S2 Episode 19 – The Dead Hooker Juxtaposition
    The Big Bang Theory S2 Episode 18 – The Work Song Nanocluster
    The Big Bang Theory S2 Episode 17 – The Terminator Decoupling
    The Big Bang Theory S2 Episode 16 – The Cushion Saturation
    The Big Bang Theory S2 Episode 15 – The Maternal Capacitance
    The Big Bang Theory S2 Episode 14 – The Financial Permeability
    The Big Bang Theory S2 Episode 13 – The Friendship Algorithm
    The Big Bang Theory S2 Episode 12 – The Killer Robot Instability
    The Big Bang Theory S2 Episode 11 – The Bath Item Gift Hypothesis
    The Big Bang Theory S2 Episode 10 – The Vartabedian Conundrum
    The Big Bang Theory S2 Episode 9 – The White Asparagus Triangulation
    The Big Bang Theory S2 Episode 8 – The Lizard-Spock Expansion
    The Big Bang Theory S2 Episode 7 – The Panty Piñata Polarization
    The Big Bang Theory S2 Episode 6 – The Cooper-Nowitzki Theorem
    The Big Bang Theory S2 Episode 5 – The Euclid Alternative
    The Big Bang Theory S2 Episode 4 – The Griffin Equivalency
    The Big Bang Theory S2 Episode 3 – The Barbarian Sublimation
    The Big Bang Theory S2 Episode 2 – The Codpiece Topology
    The Big Bang Theory S2 Episode 1 – The Bad Fish Paradigm

Season 1

    The Big Bang Theory S1 Episode 17 – The Tangerine Factor
    The Big Bang Theory S1 Episode 16 – The Peanut Reaction
    The Big Bang Theory S1 Episode 15 – The Pork Chop Indeterminacy
    The Big Bang Theory S1 Episode 14 – The Nerdvana Annihilation
    The Big Bang Theory S1 Episode 13 – The Bat Jar Conjecture
    The Big Bang Theory S1 Episode 12 – The Jerusalem Duality
    The Big Bang Theory S1 Episode 11 – The Pancake Batter Anomaly
    The Big Bang Theory S1 Episode 10 – The Loobenfeld Decay
    The Big Bang Theory S1 Episode 9 – The Cooper-Hofstadter Polarization
    The Big Bang Theory S1 Episode 8 – The Grasshopper Experiment
    The Big Bang Theory S1 Episode 7 – The Dumpling Paradox
    The Big Bang Theory S1 Episode 6 – The Middle Earth Paradigm
    The Big Bang Theory S1 Episode 5 – The Hamburger Postulate
    The Big Bang Theory S1 Episode 4 – The Luminous Fish Effect
    The Big Bang Theory S1 Episode 3 – The Fuzzy Boots Corollary
    The Big Bang Theory S1 Episode 2 – The Big Bran Hypothesis
    The Big Bang Theory S1 Episode 1 – Pilot