The Big Bang Theory (season 2, episode 23) Leonard and Penny reevaluate their affections for each other when Leonard and his companions choose to spend the late spring working at the North Pole. The Big Bang Theory (season 2, episode 23) Click on image to watch 1234567891011121314151617181920212223

The Big Bang Theory (season 2, episode 17) Leonard, Sheldon and Wolowitz are overjoyed to discover that a well known sci-fi entertainer (Summer Glau) is on board the train they are taking to San Francisco. The Big Bang Theory (season 2, episode 17) Click on image to watch 1234567891011121314151617181920212223

The Big Bang Theory (season 2, episode 12) At the point when Penny's remark about Wolowitz's affection life sends him into a discouraged trance, his companions lose their most significant partner in a forthcoming battling robot rivalry. The Big Bang Theory (season 2, episode 12) Click on image to watch 1234567891011121314151617181920212223

The Big Bang Theory (season 2, episode 7) Sheldon and Penny take part in a clash of wills as Penny promises to seek retribution on Sheldon when he bans her from the condo for a progression of frivolous infractions. The Big Bang Theory (season 2, episode 7) Click on image to watch 1234567891011121314151617181920212223