Great sites
Quotes
Sheldon: Oh, well, this would be one of those circumstances that people unfamiliar with the law of large numbers would call a coincidence.
Trivia
Raj's question about why so many of Stan Lee's characters' first and last names begin with the same initial (Peter Parker, Reed Richards, Bruce Banner, etc.) has been answered by Lee in interviews before: He has a bad memory for names, so if he can remember one of their names, he knows the other starts with the same letter. See more...
The Big Bang Theory (2007) - 5 mistakes in show overall
starring Jim Parsons, Johnny Galecki, Kaley Cuoco, Kunal Nayyar, Simon Helberg (add more)
Some of these may not have been submitted with enough information to assign them to their proper episode - if you know where they belong, please click 'edit' under the entry, then choose the "change episode" option.