The sitcom is centered on five characters living in Pasadena, California: roommates Leonard Hofstadter and Sheldon Cooper; Penny, a waitress and aspiring actress who lives across the hall; and Leonard and Sheldon's equally geeky and socially awkward friends and co-workers, mechanical engineer Howard Wolowitz and astrophysicist Raj Koothrappali. The geekiness and intellect of the four guys is contrasted for comic effect with Penny's social skills and common sense.
1x01Pilot
1x02The Big Bran Hypothesis
1x03The Fuzzy Boots Corollary
1x04The Luminous Fish Effect
1x05The Hamburger Postulate
1x06The Middle-Earth Paradigm
1x07The Dumpling Paradox
1x08The Grasshopper Experiment
1x09The Cooper-Hofstadter Polarization
1x10The Loobenfeld Decay
1x11The Pancake Batter Anomaly
1x12The Jerusalem Duality
1x13The Bat Jar Conjecture
1x14The Nerdvana Annihilation
1x15The Pork Chop Indeterminacy
1x16The Peanut Reaction
1x17The Tangerine Factor