Penny starts working at the Cheesecake Factory; Leonard and Penny share their first real date in the season finale.
"The Lunar Excitation" brings Amy into Sheldon's life via an online dating site algorithm set up by Raj and Howard. Season 4: Expanding the Universe the+big+bang+theory+season+1+2+3+4+5+6+7+8+9+10+free
Which (e.g., Sheldon, Penny, Howard) do you want to explore? Penny starts working at the Cheesecake Factory; Leonard
Introduces experimental physicist Leonard Hofstadter and theoretical physicist Sheldon Cooper. Their lives change when aspiring actress Penny moves in across the hall. Engineers Howard Wolowitz and astrophysicist Raj Koothrappali round out the group. the+big+bang+theory+season+1+2+3+4+5+6+7+8+9+10+free