The following episodes appear during Season 4 of the Big Bang Theory.
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Rajesh Koothrappali -
Sheldon Cooper -
Bernadette Rostenkowski-Wolowitz -
Amy Farrah Fowler -
Penny -
Leonard Hofstadter -
Howard Wolowitz -
Mary Cooper
All items (150)
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7
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File:Aa4.jpg
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File:Aa5.jpg
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Aarti Mann
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File:Ab7.jpg
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The Agreement Dissection
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Alice Amter
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The Alien Parasite Hypothesis
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Althea Davis
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Amy's Apartment
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Category:Amy's only four guest appearances
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Angela (Season 4)
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Angela Page
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Apartment 4A
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Apartment 4B
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The Apology Insufficiency
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Aquaman
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Aunt Ruth
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Barry Kripke
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Batman
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Battlestar Galactica
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Bazinga
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The Benefactor Factor
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Stuart Bloom
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Brian George
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Brian Greene
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Brian Smith
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Captain James T. Kirk
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Captain Sweatpants
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Carl
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Category:Season 4 Characters
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The Cheesecake Factory
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The Cohabitation Formulation
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The Comic Center of Pasadena
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Contradictions
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Sheldon Cooper
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Cooper-Wheaton War
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Counter Factuals
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E
F
G
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George Cooper Sr.
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George Cooper Sr.'s Brother-in-law (Sister's Husband)
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George Cooper Sr.'s Sister
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George Takei
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Girlfriend Pact
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Glenn
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Gorn
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Green Lantern
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Harry Potter
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Hawaiian
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The Herb Garden Germination
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High School janitor
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Hofstadter
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Penny
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Howard and Bernadette's Apartment
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J
K
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Leonard And Michael's Brother-in-law (Sister's Husband)
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Leonard and Priya
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Leonard Hofstadter
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Leonard Nimoy
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Leonard's Sister
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LeVar Burton
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List of The Big Bang Theory episodes
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List of The Big Bang Theory Home Media
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Lonely Larry
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Main Characters
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Mars Rover
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Mary Cooper
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Meemaw
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Mobile Virtual Presence Device
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Mr. Cooper
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Mrs. Cooper
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Mrs. Fowler
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Mrs. Koothrappali
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Mrs. Latham
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Mystic Warlords of Ka'a
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P
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Pasha D. Lychnikoff
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Penny's Posse
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President Siebert
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The Prestidigitation Approximation
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Priya Koothrappali
R
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Raj's apartment
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Rajesh Koothrappali
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The Robotic Manipulation
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The Roommate Transmogrification
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Bernadette Rostenkowski-Wolowitz
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Running Gags
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Sheldon's Cats
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Sheldon's Knock
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Sheldon's Social Group
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Sigmund Freud
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The Social Group
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Soft Kitty
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Category:Soft Kitty
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The Stars Nearest To Me
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Steve Wozniak
T
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The Boyfriend Complexity
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The Bus Pants Utilization
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The Complete Fourth Season (DVD)
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The Cruciferous Vegetable Amplification
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The Desperation Emanation
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The Lord of the Rings
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The Love Car Displacement
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The Toast Derivation
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The Zazzy Substitution
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The Thespian Catalyst
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Three-Person Chess
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Timeline of Events that Happened in the Fourth Season
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Todd Zarnecki
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V
W
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Where No Sheldon Has Gone Before
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Wil Wheaton
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The Wildebeest Implementation
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Wolowitz House
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Wolowitz Programmable Hand
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Howard Wolowitz
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Wonder Woman
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World of Warcraft
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Wyatt
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