The Peanut Reaction

Summary
When Penny finds out that Leonard has never had a birthday party she decides to throw his a surprise one. While she takes Sheldon to buy him a present, Howard has to distract Leonard.

Trivia

 * Sheldon disputes Penny's believe in horoscopes based on the research of Bertram Forer
 * When Howard attempts to bribe the ER nurse with "the man who freed your people", the bill he's offering must be one with Abraham Lincoln on it, which would be $5. Her response to his bribe indicates she'd need to see six bills with Benjamin Franklin on them, to be bribed. Benjamin Franklin is on the $100 bill, so Howard is about $595 short.
 * The woman at the ER is the same person as the woman running the Sperm Donation Place as in Season 1 Episode 1 Pilot

Critics
"The show at its best. The characters are clear and the humour is consistent. A really enjoyable episode." - The TV Critic's Review