Trivia: During Season 3, the producers learned of a show called "The Theorists" in the country of Belarus that was a copy of this show. A lawsuit for copyright infringement would have been pointless since the production company for "The Theorists" was owned by the Belarus government. A lawsuit, however, was not needed because when the actors and actresses found out the show was a rip-off this one, they promptly quit and "The Theorists" was cancelled.
Trivia: Sheldon and Leonard were named after producer/creator Sheldon Leonard, who created and produced such TV hits as the Dick Van Dyke Show and the Andy Griffith Show, as Chuck Lorre was a huge fan of his.
The Cooper Extraction - S7-E11
Trivia: Penny gets her break appearing in NCIS. Kunal Nayyar who plays Raj, had his first acting job on NCIS season 4 episode 12 Suspicion. Coincidentally this is the episode prior to Penny's episode.
Trivia: When ever the characters visit Will Wheaton's house, the number on the house is 1701, which is the hull number of the USS Enterprise from all the Star Trek TV shows and movies. Wheaton rose to fame as a cast member of Star Trek: The Next Generation.
Suggested correction: Not being able to afford doesn't necessarily mean he doesn't have the money, especially a man like Sheldon. He works with a budget and he sticks to it. In his budget he has a certain amount set aside for rent, anything more than that and he can't afford it alone.
Nonsense. If he was sticking to a "rigid budget" he wouldn't have even thought of lending a hopeless credit risk like Penny a single cent. Instead he throws a huge bankroll at her without even discussing a repayment plan.
Rubbish, I stick to a strict budget but still have the money to lend to close friends. Like Penny is to him.
He might have different budgets for different things. People could get a higher margin because they could be of more use to the scientific mind of Sheldon.