The Big Bang Theory Season 9 Episodes

Find out where to watch Season 9 of The Big Bang Theory tonight
Overview TV Listings Seasons & Episodes Cast

Season 9 Episode Guide

Episode 1 - The Matrimonial Momentum

Penny struggles with Leonard's confession.
Episode 2 - The Separation Oscillation

Sheldon retaliates at Amy using "Fun with Flags".
Episode 3 - The Bachelor Party Corrosion

The guys surprise Leonard with a belated bachelor party.
Episode 4 - The 2003 Approximation

Sheldon must search for a new roommate.
Episode 5 - The Perspiration Implementation

Kripke shows an interest in Amy - to Sheldon's chagrin.
Episode 6 - The Helium Insufficiency

Leonard and Sheldon buy helium on the black market.
Episode 7 - The Spock Resonance

Leonard and Penny are shocked to learn of Sheldon's ring.
Episode 8 - The Mystery Date Observation

Amy goes on a date with a mystery man.
Episode 9 - The Platonic Permutation

Amy and Sheldon spend Thanksgiving together as friends.
Episode 10 - The Earworm Reverberation

Sheldon desperately wrestles with a song stuck in his head.
Episode 11 - The Opening Night Excitation

Sheldon and Amy spend their first night together.
Episode 12 - The Sales Call Sublimation

Stuart moves out of Howard and Bernadette's house.
Episode 13 - The Empathy Optimisation

When Sheldon is sick, the whole gang suffers.
Episode 14 - The Meemaw Materialisation

Leonard, Penny and the gang finally meet Sheldon's Meemaw.
Episode 15 - The Valentino Submergence

Sheldon and Amy host a live episode of "Fun with Flags".
Episode 16 - The Positive Negative Reaction

The gang celebrates Bernadette's baby news with karaoke!
Episode 17 - The Celebration Experimentation

Sheldon celebrates his birthday.
Episode 18 - The Application Deterioration

Leonard, Sheldon and Howard apply for a patent together.
Episode 19 - The Soldier Excursion Diversion

Sheldon shares a secret with Amy after his laptop dies.
Episode 20 - The Big Bear Precipitation

Secrets are revealed on a weekend getaway.
Episode 21 - The Viewing Party Combustion

Everyone takes sides in a fight between Leonard and Sheldon.
Episode 22 - The Fermentation Bifurcation

Sheldon and Bernadette hang out together while the gang is out.
Episode 23 - The Line Substitution Solution

Penny struggles to bond with Leonard's mother, Beverly.
Episode 24 - The Convergence Convergence

Leonard and Penny try to have a wedding ceremony that everyone can attend, but it creates serious conflict.


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