But I am taking Penny to Switzerland. Chang's. He thinks I betrayed him. Help me out, which ski hat says après supercollider? Howard: I'd take Sheldon to Switzerland. I had a date with Bernadette. I think I might have the flu. I used to be like that. Leonard: It is. Leonard: Penny. Leonard: Sheldon, I need to talk to you. Leonard: Well, forget it. Listen, Penny is pretty sick and she's not going to be able to go to Switzerland. Number 37, in the event one friend is ever invited to visit the Large Hadron Collider, now under construction in Switzerland, he shall invite the other friend to accompany him. Raj: It's okay. Sheldon (Hugging her): Oh, Penny, thank you! Sheldon (trying it): It's actually not bad. Sheldon: Actually, he might have to. Sheldon: With the little stars? Sheldon: You will?
Plan: A: a conference; Q: What is Leonard taking Penny to in Switzerland? A: the Large Hadron Collider; Q: What did Leonard and Penny visit in Switzerland? A: his friendship; Q: What did Leonard terminate with Sheldon? A: the flu; Q: What illness did Penny catch that caused Leonard to change his mind about taking Sheldon to Switzerland? A: Raj; Q: Who did Sheldon take to Switzerland when he was sick? Summary: Sheldon feels betrayed when Leonard decides to take Penny, not Sheldon, with him to a conference in Switzerland, where they will also have the chance to visit the Large Hadron Collider. After failing to convince Leonard to change his mind, Sheldon tries to convince Penny to drop out, which leads Leonard to terminate his friendship with Sheldon. However, when Penny has caught the flu, Leonard changes his mind and allows Sheldon to go, only to find out he is sick as well, causing him to take Raj. It is later revealed that Sheldon caught it from Penny when he hugged her.