The Big Bang Theory

Season 4

Add Show to Watchlist
This season the Big Bang gang’s romantic universe expands. On the rebound from Penny, Leonard falls into the arms of Raj’s sister Priya. Sheldon gets a girlfriend, or rather a friend who is a girl: Amy, a dour neurobiologist who declares herself besties with Penny. Howard and Bernadette heat up. And so do Raj and Bernadette (at least in Raj’s Bollywood daydream).
Watch from these locations
24 Episodes
  • The Robotic Manipulation
    E1
    The Robotic ManipulationEpisode 1
  • The Cruciferous Vegetable Amplification
    E2
    The Cruciferous Vegetable AmplificationEpisode 2
  • The Zazzy Substitution
    E3
    The Zazzy SubstitutionEpisode 3
  • The Hot Troll Deviation
    E4
    The Hot Troll DeviationEpisode 4
  • The Desperation Emanation
    E5
    The Desperation EmanationEpisode 5
  • The Irish Pub Formulation
    E6
    The Irish Pub FormulationEpisode 6
  • The Apology Insufficiency
    E7
    The Apology InsufficiencyEpisode 7
  • The 21-Second Excitation
    E8
    The 21-Second ExcitationEpisode 8
  • The Boyfriend Complexity
    E9
    The Boyfriend ComplexityEpisode 9
  • The Alien Parasite Hypothesis
    E10
    The Alien Parasite HypothesisEpisode 10
  • The Justice League Recombination
    E11
    The Justice League RecombinationEpisode 11
  • The Bus Pants Utilization
    E12
    The Bus Pants UtilizationEpisode 12
  • The Love Car Displacement
    E13
    The Love Car DisplacementEpisode 13
  • The Thespian Catalyst
    E14
    The Thespian CatalystEpisode 14
  • The Benefactor Factor
    E15
    The Benefactor FactorEpisode 15
  • The Cohabitation Formulation
    E16
    The Cohabitation FormulationEpisode 16
  • The Toast Derivation
    E17
    The Toast DerivationEpisode 17
  • The Prestidigitation Approximation
    E18
    The Prestidigitation ApproximationEpisode 18
  • The Zarnecki Incursion
    E19
    The Zarnecki IncursionEpisode 19
  • The Herb Garden Germination
    E20
    The Herb Garden GerminationEpisode 20
  • The Agreement Dissection
    E21
    The Agreement DissectionEpisode 21
  • The Wildebeest Implementation
    E22
    The Wildebeest ImplementationEpisode 22
  • The Engagement Reaction
    E23
    The Engagement ReactionEpisode 23
  • The Roommate Transmogrification
    E24
    The Roommate TransmogrificationEpisode 24
Cast of Season 4
  • Johnny GaleckiLeonard Hofstadter
  • Jim ParsonsSheldon Cooper
  • Kaley CuocoPenny
  • Simon HelbergHoward Wolowitz
  • Kunal NayyarRajesh Koothrappali
  • Melissa RauchBernadette Rostenkowski
  • Mayim BialikAmy Farrah Fowler
Watch Season 4 Videos
  • The Big Bang Theory: Season 4
    The Big Bang Theory: Season 4Trailer
  • The Big Bang Theory: Penny
    The Big Bang Theory: PennyBehind the Scenes
  • The Big Bang Theory: Behind The Scenes
    The Big Bang Theory: Behind The ScenesBehind the Scenes
  • The Big Bang Theory: The Boyfriend Complexity
    The Big Bang Theory: The Boyfriend ComplexityScene

Take Plex everywhere

Watch free anytime, anywhere, on almost any device.
See the full list of supported devices