Ep 10. The Flaming Spittoon Acquisition

Howard receives an email from his ex-girlfriend, Bernadette, asking if they can meet up and catch up on old times. Meanwhile, Sheldon is faced with a dilemma when he discovers that Stuart, the owner of the comic book store, has acquired a rare comic book that Sheldon has been searching for his entire life. Sheldon tries to barter with Stuart for the book but is unsuccessful.

Later, Howard and Bernadette meet up and it becomes clear that Bernadette still has feelings for Howard. However, Howard is conflicted as he is dating someone else. Bernadette suggests that they take things slow and see where it goes.

Back at the comic book store, Sheldon returns with a new strategy to acquire the rare comic book. He decides to challenge Stuart to a game of "klingon boggle", a language game involving the fictional language of the Klingons from the Star Trek franchise. Sheldon is convinced that he will win, but the game proves to be much more challenging than he anticipated. He becomes so engrossed in the game that he loses track of time and misses an important meeting with Amy.

The episode ends with Howard and Bernadette sharing a kiss, while Sheldon finally acquires the rare comic book after defeating Stuart in klingon boggle. However, he soon realizes that he spent so much time obtaining the book that he missed out on spending time with Amy, leaving him feeling guilty.