Leonard: Who are you?
Toby: I am Sheldon's cousin Leo.
Leonard: Oh, God! Sheldon does not have a cousin Leo.
Toby: Au contraire. I'm 26 years old. I'm originally from (reads off character profile) Denton, Texas, but I was a Navy brat so I was brought up on a variety of military bases around the world. As a result, I've often felt like an outsider, never really fitting in, which is probably the reason for my substance abuse problem.
Sheldon: Excuse me, we just went over this. As the quintessential middle child, your addiction is rooted in your unmet need for attention.
Toby: Oh, Sheldon, are we really going to go with pop psychology.