From Leonard's secrets to Penny's commitment issues, not everything seems to add up. Looking back, these are some of the strange things we noticed about Leonard and Penny's relationship in "The ...

Meanwhile, her husband Leonard (Johnny Galecki) works at CalTech (the California Institute of Technology) with all his friends for the entire series. So does Penny earn a bigger paycheck than Leonard?

One of the big mysteries of The Big Bang Theory that keeps viewers tuning in is whether Leonard and Penny will ultimately wind up together.In an appearance on The Talk, Kaley Cuoco, who plays ...