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Beverly Hugs Leonard
Watch The Big Bang Theory Season 3 Episode 11
"The Maternal Congruence"
Original Air Date:

Leonard's mother, Beverly (Christine Baranski), is back and Leonard is upset to find out she's getting divorced and told Sheldon, not him.

Wolowitz Gets Jealous
Watch The Big Bang Theory Season 3 Episode 10
"The Gorilla Experiment"
Original Air Date:

Penny seeks Sheldon's help to better understand Leonard's work; Wolowitz gets jealous when Leonard and Bernadette become friends.

Wolowitz and Bernadette Kiss
Watch The Big Bang Theory Season 3 Episode 9
"The Vengeance Formulation"
Original Air Date:

When Kripke embarrasses Sheldon on NPR, he swears revenge; Wolowitz is scared to commit to Bernadette.

Camping with a Computer
Watch The Big Bang Theory Season 3 Episode 8
"The Adhesive Duck Deficiency"
Original Air Date:

When Leonard, Raj and Wolowitz go camping, an injured Penny must rely on Sheldon for help.

Sheldon Shows Off Board Game
Watch The Big Bang Theory Season 3 Episode 7
"The Guitarist Amplification"
Original Air Date:

When Penny's musician ex-boyfriend wants to crash on her couch, Leonard and Penny fight and Sheldon tries to stop them.

Leonard in Football Jersey
Watch The Big Bang Theory Season 3 Episode 6
"The Cornhusker Vortex"
Original Air Date:

Leonard gets tutored in football by Sheldon; a kite flying mishap causes a fight between Wolowitz and Raj

Penny Plays with the Boys
Watch The Big Bang Theory Season 3 Episode 5
"The Creepy Candy Coating Corollary"
Original Air Date:

Sheldon goes up again the Star Trek actor, Wil Wheaton; Wolowitz wants Penny to set him up with one of her friends

Raj Works for Sheldon
Watch The Big Bang Theory Season 3 Episode 4
"The Pirate Solution"
Original Air Date:

Desperate to avoid going back to India, Raj considers a job working for Sheldon; Howard becomes a third wheel to Leonard and Penny

Sheldon Uses Positive Reinforcement
Watch The Big Bang Theory Season 3 Episode 3
"The Gothowitz Deviation"
Original Air Date:

Howard takes Raj with him to the Goth dating scene; Sheldon uses chocolate as part of his behavioral experiment on Penny.

The Boys Search for the Cricket
Watch The Big Bang Theory Season 3 Episode 2
"The Jiminy Conjecture"
Original Air Date:

Leonard and Penny try and make things not awkward after their hookup; Sheldon and Wolowitz bet their best comic books on a bet to determine the species of a cricket

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TBBT Quotes

Mrs. Cooper: Shelly! I'm so glad you're here!
Sheldon: I saw you having naked sex.

Penny: I give up, he's impossible
Sheldon: I can't be impossible, I exist. I believe what you meant to say is, "I give up, he's improbable."