There is an interesting development lined-up in episode 12 of "The Big Bang Theory." The episode is called "The Hesitation Ramification." Penny, in an inebriated state, is likely to get down on her knee to propose to Leonard.

According to the spoilers, Leonard will be taken aback by the sudden marriage proposal, and is not going to say yes. The proposal comes after Penny's role in NCIS is edited out. A dejected, frustrated Penny feels that she has lost a big break and that she has struggled for ten years to become an actress, without any success. Leonard is trying his best to cheer-her-up. However, he did not expect a formal proposal from Penny. Leonard's no reply to the proposal is going to make Penny more frustrated. Sheldon is likely to ask Leonard whether it is the end of his relationship with Penny.

In the episode, Sheldon will try to learn how to be funny by researching on ways to increase his humour quotient. The spoilers suggest that Amy won't be much impressed and will get bored of Sheldon's search for humour. However, Amy will find it funny when Sheldon drops his pants.

It is high time that Raj gets a serious love interest. In the finale of the last season, he began talking in front of women without needing the assistance of alcohol. However, lady luck has eluded him so far. In the upcoming episode, Raj will work on the strategy to impress girls. Raj and Stuart again come together and intend to go to a mall to talk to the girls. The spoilers suggest that the two reach the mall and meet a male security where he tells Raj and Stuart that the mall is closing.

Official Synopsis of "The Big Bang Theory" Season 7, Episode 12, "The Hesitation Ramification": "When Penny's big acting break on NCIS is a bust, Leonard struggles to help her, which results in Penny asking Leonard a bold relationship question. Meanwhile, Sheldon tries to learn how to be funny and Raj tries to work on his "game" before talking to girls."