TEXT: [ Amy's laboratory ] [SCENE_BREAK] Sheldon: I've invented a science joke, would you like to hear it? Amy: Sure. Sheldon: How many Edisons does it take to screw in a light bulb? Amy: How many? Sheldon: Who cares? He stole the idea and doesn't deserve his own joke. Amy: Is that really true? Sheldon: Of course, that's how you know it's a good joke. It not only entertains, it informs. Barry: Hey, sowwy to intewupt. Sheldon: Uh, Barry, uh, how many Edisons does it take to screw in a light bulb? Barry: Did you know Edison didn't actuawy invent the wight bulb? Sheldon: What do you want, Barry? Barry: Just wanted to dwop this off as a wittle thank you for Amy. Amy: What's this for? Barry: Your idea weawy hewped me out. My wight-cone quantization paper's onwine alweady. The wesponse has been amazing. Amy: Well, that's fascinating. I can't wait to read it. Sheldon: Oh, no, me as well. Uh, please e-mail it to Sheldon at bazinga dot biz. Why dot biz? Because I just gave you the business. And also bazinga dot com was taken. Barry: Anyway, thanks again. Cooper, suck eggs. Sheldon: Since when do you help out Barry Kripke? Amy: Well, I'd been thinking about a cellular automata approach to neuronal connectivity, and I thought it might have some interesting applications to string theory, it's not a big deal. Sheldon: Oh, really? When I was doing string theory and hit a dead end, why didn't you try to help me? Amy: I did. You said the only math biologists know is if you have three frogs and one hops away, that leaves two frogs. Sheldon: That's
SUMMARY:
Barry Kripke stops by to thank Amy for helping him with her ideas on string theory, which bothers Sheldon because she never helped him out when he was working on it. He complains to Penny who tells him to "let it go". Instead, Sheldon reveals that Amy was secretly performing experiments on Penny and Leonard and comparing the results with those of a chimpanzee, infuriating Penny. Leonard and Raj run into Nathan Fillion at a deli, but he denies he is an actor so he can eat in peace. Later, he admits who he is and offers to take a picture with them. Raj, who now doubts whether he is the real Nathan Fillion, asks questions to verify his identity and annoys him. Stuart has opened his newly-renovated comic book store, which impresses everyone except Howard who finds him using some of his mother's furniture. However, all arguments end when Howard gets a call from Florida where his mother is visiting, and receives news that she died in her sleep. Everyone, including Sheldon who knows how it feels to lose a family member, goes to comfort Howard. After he and Bernadette leave for Florida, the rest of the gang remember and toast Mrs. Wolowitz, with Leonard calling her "a loving mother to all of us".