The Big Bang Theory Season 5 Episodes

Find out where to watch Season 5 of The Big Bang Theory tonight
Overview TV Listings Seasons & Episodes Cast

Season 5 Episode Guide

Episode 1 - The Skank Reflex Analysis

The gang deals with Penny and Raj's night together.
Episode 2 - The Infestation Hypothesis

A fight between Sheldon and Penny leaves Amy in the middle.
Episode 3 - The Pulled Groin Extrapolation

Leonard attends a wedding as Amy's date.
Episode 4 - The Wiggly Finger Catalyst

Penny introduces Raj to a girl he can actually talk to!
Episode 5 - The Russian Rocket Reaction

Wil Wheaton invites Sheldon and Leonard to a party.
Episode 6 - The Rhinitis Revelation

Sheldon craves attention from his visiting mother.
Episode 7 - The Good Guy Fluctuation

Sheldon tries to spook his friends on Halloween.
Episode 8 - The Isolation Permutation

Bernadette and Penny shop for wedding dresses...without Amy.
Episode 9 - The Ornithophobia Diffusion

Sheldon must overcome his fear of birds.
Episode 10 - The Flaming Spittoon Acquisition

Sheldon becomes jealous when Stuart asks Amy for a date.
Episode 11 - The Speckerman Recurrence

Leonard comes face-to-face with his high school bully.
Episode 12 - The Shiny Trinket Maneuver

Penny teaches Sheldon to be a better boyfriend.
Episode 13 - The Recombination Hypothesis

Will Leonard and Penny get back together?
Episode 14 - The Beta Test Initiation

Leonard and Penny "beta test" their relationship.
Episode 15 - The Friendship Contraction

Leonard finally gets fed up with Sheldon's selfish demands.
Episode 16 - The Vacation Solution

Forced to take a vacation, Sheldon "helps" Amy in her lab.
Episode 17 - The Rothman Disintegration

Sheldon competes with Kripke for a corner office at work.
Episode 18 - The Werewolf Transformation

Sheldon's life goes off-track when his barber gets sick.
Episode 19 - The Weekend Vortex

The girls get in the way of a guys-only gaming weekend.
Episode 20 - The Transporter Malfunction

Sheldon has a close encounter with Mr. Spock.
Episode 21 - The Hawking Excitation

Sheldon has a chance to meet his hero, Stephen Hawking.
Episode 22 - The Stag Convergence

Howard's marriage is in jeopardy after his bachelor party.
Episode 23 - The Launch Acceleration

Howard's NASA mission puts his wedding in jeopardy.
Episode 24 - The Countdown Reflection

Howard faces space and marriage.


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