AVAILABLE EPISODES

A squabble over the thermostat setting leads to Leonard going over to Penny's and recounting for her the story of how he met and moved in with Sheldon.
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Howard and Raj try to find the perfect match for Sheldon by setting him up on an Internet dating site. Seeing her new boyfriend interact with the gang makes it clear to Penny that she can't go back to dating dumb jocks after dating Leonard.
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Howard uses a robotic arm for his own pleasure, and Sheldon goes on a date with Amy Farrah Fowler, his first date ever, and Penny finds herself accompanying them.
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When Sheldon breaks up with Amy Farrah Fowler, the guys worry when he starts replacing her with cats.
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Wolowitz is embarrassed when a secret of his is revealed, and Sheldon and Raj battle at work.
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Sheldon meets Amy Farrah Fowler's mother and comes to the realization he no longer wants to see Amy; and Leonard realizes everyone is in a relationship except for him.
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When Raj's sister has a one-day layover, he forbids the others from hooking up with her unaware she and Leonard already did long ago.
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Penny asks Leonard to lie to her visiting father, while Howard, Raj and Bernadette spend all night looking through a telescope.
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The guys get Zack and Penny to join their Justice League costume for a New Year's Eve bash at the comic book store.
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Howard is jealous when Bernadette runs into her old boyfriend at a science event they're attending.
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Howard contemplates a serious decision in his relationship with Bernadette; and Leonard and Raj's sister start seeing each other again.
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Leonard has a tough choice to make when Priya asks him to stop spending time with Penny, forcing him to choose between the two women; and Howard keeps pestering Sheldon with a magic trick.
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About
Leonard and Sheldon are brilliant physicists, the kind of ''beautiful minds'' that understand how the universe works. But none of that genius helps them interact with people, especially women. All this begins to change when a free-spirited beauty named Penny moves in next door.