Fox News'The Big Bang Theory' recap: Penny's in love...with Sheldon?Fox News'The Big Bang Theory' returned with plenty of laughs following last week's heart-wrenching episode. Penny, Sheldon and their unique relationship came into focus when the duo tried out an experiment designed to make people fall in love. They spend the ...BIG BANG THEORYTVGrapevine.comall 37 news articles »