Are you looking to watch The Big Bang Theory online? Good! You've come to the right place. We make it easy to watch The Big Bang Theory online on a weekly basis.

Koothrappali Fantasy
Watch The Big Bang Theory Season 4 Episode 14
"The Thespian Catalyst"
Original Air Date:

Sheldon gets acting lessons from Penny on this episode. Elsewhere, Koothrappali fantasizes about his best friend's gal.

Rick Fox on The Big Bang Theory
Watch The Big Bang Theory Season 4 Episode 13
"The Love Car Displacement"
Original Air Date:

There's tension at a hotel this week. That's because the group runs into Bernadette's ex-boyfriend during a science event.

The Bus Pants Utilization Scene
Watch The Big Bang Theory Season 4 Episode 12
"The Bus Pants Utilization"
Original Air Date:

Leonard gets an idea for a smart phone application on this episode. How does that go? Find out now.

As the Justice League
Watch The Big Bang Theory Season 4 Episode 11
"The Justice League Recombination"
Original Air Date:

The guys find a use for Penny's boyfriend this week, as they enter a costume contest and they go as the Justice League members.

Penny, Bernadette and Amy
Watch The Big Bang Theory Season 4 Episode 10
"The Alien Parasite Hypothesis"
Original Air Date:

Amy realizes she has sexual feelings for Penny's ex on this episode. That's awkward. Meanwhile, Koothrappali and Wolowitz attempt to prove who would be the better superhero.

Keith Carradine on TBBT
Watch The Big Bang Theory Season 4 Episode 9
"The Boyfriend Complexity"
Original Air Date:

Penny asks Leonard to fib to her father this week. Elsewhere, Howard, Raj and Bernadette go for an all-nighter with a telescope.

Return of Wil Wheaton
Watch The Big Bang Theory Season 4 Episode 8
"The 21-Second Excitation"
Original Air Date:

Wil Wheaton is back this week! He causes problems for the guys when they try to see a movie. Elsewhere, Penny and Bernadette invite Amy to a sleepover.

Pretty, Funny Guest Star
Watch The Big Bang Theory Season 4 Episode 7
"The Apology Insufficiency"
Original Air Date:

Sheldon places Wolowitz's security clearance in danger this week. How so? By answering questions from an agent played by Eliza Dushku.

The Irish Pub Formulation Scene
Watch The Big Bang Theory Season 4 Episode 6
"The Irish Pub Formulation"
Original Air Date:

A major secret abounds this week, as Leonard keeps quiet about an affair with Raj's sister. Will Sheldon keep the secret?

Amy with Sheldon
Watch The Big Bang Theory Season 4 Episode 5
"The Desperation Emanation"
Original Air Date:

Amy wants to introduce Sheldon to her mother on this episode. Meanwhile, Leonard is down on himself as he comes to terms with the fact that all the other guys have girlfriends.

We know why you want to watch The Big Bang Theory online. We understand why you would seek to stay up to date on everything surrounding Sheldon, Leonard, Penny, Amy and all others. They are totally hilarious! And they are also involved in many sweet and interesting storyline. That's why you want to watch The Big Bang Theory online and that is why we make it oh so easy for TV Fanatics to do so. We update our episodes section on a weekly basis and we make sure you never fall behind. Sit back and watch The Big Bang Theory online now!

TBBT Quotes

Penny: Hey, Sheldon, did you change your Wi-Fi password again?
Sheldon: Yes, it's "Penny, get your own Wi-Fi." No spaces.

Penny, there's only one cookie with something in the middle that solves life's problems, and that's an Oreo. Or a Nutter Butter, if you're in a pinch.

Sheldon