Leonard and Penny Argue

As usual, Leonard and Penny get into an argument. This time? About psychics.
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Sheldon and His Hulk Hands

Sheldon defines the word cool when he puts on his toy hulk hands and in front of Raj.
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Raj, Sheldon Play Rock Band

After meeting two girls at the university mixer, Raj and Sheldon invite them for a raging game of Rock Band at the apartment.
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Decorating The Tree

Sheldon helps decorate the tree and wants to add the bust of Sir Isaac Newton, which he argues is more Christmasy than Jesus.
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Beverly Hugs Leonard

After years of trying to get his mother's affection, Leonard finally gets a hug from Beverly (Christine Baranski). All it took was getting her drunk.
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Penny and Beverly Drink

Penny and Leonard's mom, Beverly (Christine Baranski) go for some shots of tequila at the Cheesecake Factory.
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Crazy Make Out Alert

Holy kissy face! That's Leonard's mom kissing Sheldon in this stunning photograph.
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Sheldon Teaches Penny

Penny comes to Sheldon for help to better understand Leonard's work and here he is training her.
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Bernadette at Lunch

Bernadette (Melissa Rauch) joins the guys for lunch at work as she begins to bond with Leonard over his work.
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Wolowitz Confronts Leonard

Wolowitz confronts Leonard when he gets jealous over his friend bonding with his girlfriend, Bernadette.
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Raj and Sheldon Race

Raj and Sheldon race... with a little Mario Kart on the Wii.
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Wolowitz Gets Jealous

Wolowitz gets jealous when Leonard and his girlfriend Bernadette (Melissa Rauch) get friendly.
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TBBT Quotes

Sheldon [to Kripke]: Also, I am given to understand that your mother is overweight.
Raj: Oh, snap.
Sheldon: Now of course, if that is the result of a glandular condition and not sloth and gluttony then I withdraw that comment.

How is "doable" anything but a compliment?

Wolowitz