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
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 [S4E15] The Benefactor Factor
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
Title reference: Mrs. Latham, a woman Leonard has sex with so that she will donate money to the university. The next morning, Mrs
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.