TEXT: Scene: The university cafeteria. Sheldon: Your argument is lacking in all scientific merit. It is well established Superman cleans his uniform by flying into Earth's yellow sun, which incinerates any contaminate matter and leaves the invulnerable Kryptonian fabric unharmed and daisy fresh. Howard: What if he gets something Kryptonian on it? Sheldon: Like what? Howard: I don't know. Kryptonian mustard. Sheldon: I think we can safely assume that all Kryptonian condiments were destroyed when the planet Krypton exploded. Raj: Or it turned into mustard Kryptonite, the only way to destroy a rogue Kryptonian hotdog threatening Earth. Leonard: Raj, please, let's stay serious here. Superman's body is Kryptonian, therefore his sweat is Kryptonian. Howard: Yeah, what about Kryptonian pit stains? Sheldon: Superman doesn't sweat on Earth. Howard: Okay, he's invited for dinner in the Bottle City of Kandor. He miniaturizes himself, enters the city where he loses his superpowers. Now, before dinner, his host says, "who's up for a little Kryptonian tetherball?" Superman says "sure," works up a sweat, comes back to Earth, his uniform now stained with indestructible Kryptonian perspiration. Raj: Booya. Sheldon: Superman would have taken his uniform to a Kandorian dry cleaner before he left the Bottle. Raj: "Kandorian dry cl..." I give up, you can't have a rational argument with this man. Howard: Hey, isn't that the guy who won the MacArthur genius grant last year? No, not all at once. Raj: Then how? Howard: Leonard. Now, Raj. Now, Sheldon. Raj: I didn't get a good look. Can I go again? Howard: No. Leonard: It's David Underhill. So what? Sheldon: So what? His observation of high-energy
SUMMARY:
Leonard meets visiting researcher and fellow experimental physicist Dr. David Underhill. Though Leonard envies David for being handsome and a more successful physicist than himself, he jumps at David's offer to help him in his research. Things come to a halt when David meets Penny and the two start dating - though they quickly break up when Penny discovers nude photos of his wife on his phone. Leonard only learns this when he comes to Penny's apartment to yell at her about their own on-off relationship. When he realises his mistake, he and Penny cuddle each other to comfort each other. Meanwhile, Sheldon worries about the approaching Christmas holidays and his indecision about what to buy for Penny, as he needs it to match the value of her gift to him. After deciding on a basket of bath items he discovers a large selection, so not knowing what Penny will get him, he buys the entire range to cover all contingencies. Penny's gift to Sheldon is a napkin both autographed and used by Leonard Nimoy. Sheldon, overwhelmed since he now possesses Nimoy's DNA and can grow his own Leonard Nimoy, gives Penny all the gift baskets and also a rare "Sheldon" hug.