Howard, Leonard and Raj went to knock Penny's door and asked if she knows any 15-year-old girl is with a thing for smart guys.
And it seemed to have Penny misunderstood that it's them who want to date with 15-year-old girl.
At the other side, since Sheldon's prospect for Nobel Prize in physics disappeared because of Dennis Kim's showing up. He refocused his efforts and wanted to use his people skills for Noble Peace Prize with solving Middle East crisis by building an exact replica of Jurusalem in the middle of Mexico desert.
trick: something used to deceive people
may: possible true but not certain
possible: it may be true but not for certainty
prospect: possibility of being successful, especially in career
misunderstood: have wrong expression or ideas about someone or something
