[s4e15] The Benefactor Factor -

Leonard is initially repulsed by the idea of "selling himself" for science, but Sheldon is surprisingly supportive, viewing it as a logical sacrifice for the advancement of physics.

The plot centers on a moral dilemma faced by Leonard Hofstadter. The University is hosting a fundraising gala to court wealthy donors. Leonard meets , a wealthy, older widow and potential benefactor played by guest star Jessica Walter. [S4E15] The Benefactor Factor

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. Leonard is initially repulsed by the idea of

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 Leonard meets , a wealthy, older widow and

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.

Best known for her role as Lucille Bluth on Arrested Development , Walter delivers a sharp, predatory, and comedic performance as the formidable Mrs. Latham.