is the 15th episode of the fourth season of the hit CBS sitcom The Big Bang Theory , which originally aired on February 10, 2011. Episode Synopsis
After a night of conversation, Mrs. Latham makes it clear that she will only donate a substantial sum for a new cryostat—essential equipment for Leonard’s research—if he agrees to sleep with her. Key Plot Points [S4E15] The Benefactor Factor
When Leonard seeks advice from Penny, she finds the situation hilarious and encourages him to do it, teasing him about being a "gigolo" for science. is the 15th episode of the fourth season
The duo spends much of the gala trying to impress wealthy women, with Raj using his "silent charm" (since he still cannot speak to women without alcohol at this point in the series) and Howard using his usual misguided pick-up lines. Key Plot Points When Leonard seeks advice from
Best known for her role as Lucille Bluth on Arrested Development , Walter delivers a sharp, predatory, and comedic performance as the formidable Mrs. Latham.
Despite his hesitation, Leonard eventually goes through with it. The next morning, Mrs. Latham reveals she had already written the check before they went to bed, making Leonard realize he technically did it for "nothing"—though she hints she might still have more money to donate. Supporting Subplots