Leonard: And why is that? Scene: Penny's apartment. Sheldon: Our apartment was broken into, our security system tried to kill me, and as a result, I'm leaving Pasadena forever. Walks down to Leonard's room.)
Plan: A: Sheldon; Q: Who fears for his safety after his and Leonard's apartment is burgled? A: his security; Q: What does Sheldon try to increase after his apartment is burgled? Summary: Sheldon fears for his safety after his and Leonard's apartment is burgled, and takes various measures to try to increase his security.