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When Leonard, Howard and Raj are contemplating who to have as the fourth member of their Physics Bowl team, Raj says, "You know who's apparently very smart is the girl who played TV's 'Blossom'. She got a Ph.d in Neuroscience or something." The girl he's referring to is actress Mayim Bialik, who plays Amy Farrah Fowler in later episodes of The Big Bang Theory. Interestingly, she is the only recurring cast member on the show that actually does have a Ph.d in real life. See more...
The Big Bang Theory (2007) - 5 major mistakes
starring Jim Parsons, Johnny Galecki, Kaley Cuoco, Kunal Nayyar, Simon Helberg (add more)
Factual error: At the very beginning of the episode, Leonard says, "So you see what you're eating is not technically yogurt because it doesn't have enough live active acidophilus cultures". But to meet the U.S. standards for yogurt, only the starter cultures Lactobacillus bulgaricus and Streptococcus thermophilus are required, not Lactobacillus acidophilus. Source: FDA Website, Knowledge of Yogurt industry standards http://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfCFR/CFRSearch.cfm?fr=131.200&SearchTerm=yogurt.
Other: While the group are trying to figure out how to play Halo without Howard, Leonard jokingly suggests cutting Raj in half. Raj responds, "Oh sure, cut the foreigner in half. There's a billion more where he came from." But Penny is in the room with them and it's been established many times that Raj cannot talk when there are girls present (unless they are in a large group or he is drunk). Raj can't talk "around women", as explained by Leonard in the pilot.






