Watch The Big Bang Theory Online - Latest Episodes
-
Season 2 Episode 23 - The Monopolar Expedition
The guys' prestigious offer to work over the summer at the North Pole—and Penny's resultant behavior—leaves Leonard unsure if he should go.
-
Season 2 Episode 22 - The Classified Materials Turbulence
Leonard is torn between being honest or self-serving when Stuart asks his advice for an upcoming second date with Penny. Wolowitz realizes there's a crucial error in a toilet he designed for the International Space Station.
-
Season 2 Episode 21 - The Vegas Renormalization
Leonard and Raj take Wolowitz to Las Vegas to help him get over his break-up with Leslie. Sheldon, home alone and looking forward to it, locks himself out and has only one other place to stay—Penny's.
-
Season 2 Episode 20 - The Hofstadter Isotope
A fellow comic book enthusiast's hitting on Penny leads to Leonard, Raj, and Howard going to a bar's Ladies' Night.
-
Season 2 Episode 19 - The Dead Hooker Juxtaposition
Penny feels threatened when another sexy woman moves into the apartment building and angered when she senses the guys are being taken advantage of.
-
Season 2 Episode 18 - The Work Song Nanocluster
Penny's business selling hair accessories out of her apartment gets out of hand when an over-caffeinated Sheldon takes charge.
-
Season 2 Episode 17 - The Terminator Decoupling
The gang is thrilled when they see Terminator: The Sarah Connor Chronicles' Summer Glau is also aboard their train to San Francisco for a scientific symposium. Meanwhile, Sheldon frets over having forgotten a paper he wants to present to George Smoot.
-
Season 2 Episode 16 - The Cushion Saturation
Paintball leads to a squabble between Sheldon and Penny, as well as romance between Howard and Leslie.
-
Season 2 Episode 15 - The Maternal Capacitance
A visit from Leonard's mother ends up bringing him and Penny closer.
-
Season 2 Episode 14 - The Financial Permeability
When Sheldon loans money to Penny so she can pay her rent, it leads to Leonard coming face-to-face with her ex, Kurt.
-
Season 2 Episode 13 - The Friendship Algorithm
Looking to get friendly with Barry Kripke to gain access to a piece of high-tech lab equipment, Sheldon develops a flowchart process to make friends.
-
Season 2 Episode 12 - The Killer Robot Instability
Penny's criticism of Wolowitz's romantic life pushes him into depression and AWOL for a fighting robot battle the rest of guys are depending on him for.