TEXT: Scene: The university cafeteria. Sheldon: Hold. Raj: What? Sheldon: Explain your sneeze. Raj: I'm sorry? Sheldon: Do you have allergies? Raj: No. Sheldon: Is there too much pepper on your salad? Raj: I don't put pepper on salads. Sheldon: I've heard enough. Sit over there. Raj: Oh, come on. I don't want to sit by myself. Sheldon: That's what Typhoid Mary said, and clearly, her friends buckled. Raj: Guys, help me. Howard: Sheldon, come on. Leonard: Yeah, it's just one sneeze. (Raj sneezes) You're on your own. Howard: See you, buddy. Sheldon: Oh, Leonard, I have something for you. Per our roommate agreement, this is your 24-hour notice that I will be having a non-related female spending two nights in our apartment. Leonard: When you say non-related female, you still mean human, right? Sheldon: Of course. Pets are banned under the roommate agreement, with the exception of service animals, such as seeing eye dogs and, one day, cybernetically-enhanced helper monkeys. Howard: Are you planning on kidnapping a woman? Sheldon: Sarcasm? Howard: Yes, but mixed with genuine concern. Sheldon: For your information, I'll be playing host to Dr. Elizabeth Plimpton. Raj: The cosmological physicist from Princeton? Sheldon: Yes. And until you acquire a surgical mask, please address your comments to me through a napkin. We've been corresponding for years about our mutual interest in gravitational wave signatures of inflatons in the early universe. And now she's under consideration for a position at our university. Leonard: Why didn't you tell me you knew Elizabeth Plimpton? I am a huge fan of hers! Sheldon: I didn't realize I was obligated to share my connection with things you're a fan of, but very well. You enjoy Canadian bacon. I've been
SUMMARY:
Dr. Elizabeth Plimpton, a cosmological physicist from Princeton University, accepts Sheldon's invitation to stay over at the apartment during her visit to Caltech. However, she instead takes an immediate interest in Leonard, and the two end up sleeping together, inciting jealousy from Penny. However, it quickly becomes clear that Leonard and Elizabeth both have very different ideas about the nature of their relationship, when she sleeps with Raj and tries to convince Leonard and Howard (who has just broken up with Bernadette) to engage in a foursome with them.