Story by : Chuck Lorre & Steven Molaro & Adam Faberman Title reference: Sheldon describes one of his cats as being very 'zazzy', and he uses his cats to fill the void created by the breakup with Amy. He calls in Sheldon's mother, who manipulates Sheldon into reconciling with Amy. They are relieved when Sheldon and Amy break up after an argument over the relative significance of physics compared to neuroscience, but Leonard becomes worried when Sheldon brings 25 cats into the apartment.

Sheldon and Amy are very compatible with each other, but the rest of the group is irritated by their combined personalities. Teleplay by : Lee Aronsohn & Steven Molaro & Maria Ferrari Story by : Chuck Lorre & Bill Prady & Jim Reynolds Title reference: The cruciferous vegetables that Sheldon adds to his diet which give him a major case of flatulence.

Sheldon emerges from his bedroom to rush the computer to the restaurant, but breaks the computer and an ankle falling down the stairs. When Shelbot accompanies the men to the Cheesecake Factory, they see Steve Wozniak at another table, who offers to sign Sheldon's vintage Apple II computer. When that proves to be difficult, he hides in safety of his bedroom, interacting with the world through a remotely-controlled computer monitor on wheels (which Penny labels Shelbot). Sheldon worries that he will not live long enough to experience the technological singularity, so he tries to adopt a healthier lifestyle through diet and exercise. Teleplay by : Chuck Lorre & Steven Molaro & Jim Reynolds Story by : Bill Prady & Lee Aronsohn & Steve Holland ' The Cruciferous Vegetable Amplification' Title reference: Howard's use of a robotic arm for masturbation. Afterwards, Sheldon is still intent on having a child, but cancels the plan when Penny threatens to tell his mother. She accompanies them on their first date, but the conversation quickly turns to a statistical analysis of Penny's sexual history. Penny then urges him to become intimate with Amy first. Penny learns about Amy, and Sheldon's plan to conceive a child with her by in vitro fertilisation.

Howard uses a robotic hand for masturbation, but has to go to a hospital when it malfunctions. Teleplay by : Steven Molaro & Eric Kaplan & Steve Holland Story by : Chuck Lorre & Lee Aronsohn & Dave Goetsch See also: List of The Big Bang Theory episodes

Melissa Rauch as Bernadette Rostenkowski.

In January 2011, The Big Bang Theory was renewed for an additional three years extending it through the 2013–2014 season, for a fifth, sixth, seventh and eighth season. When returning to the series, she was shown working as a bartender instead of waitressing at her usual workplace, The Cheesecake Factory, to hide her injury. Penny dates a couple of guys including the dense Zack who likes the 'science dudes', Sheldon begins a platonic relationship with Amy, Howard reconnects with Bernadette eventually asking her to marry him, Leonard begins to date Raj's sister Priya, Penny becomes friends with Amy and expresses regret at breaking up with Leonard.ĭuring the season, Kaley Cuoco's character Penny was absent from episodes 5 and 6 after she fell off a horse and the horse broke her leg.

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