Blu-ray/Digital. Prepare to enter the eighth dimension of television's perpetual laughter continuum as THE BIG BANG THEORY boldly crosses the frontiers of science and comedy. Doctors Hofstadter & Cooper remain socially challenged, but the two genius roommates and their friends always produce hilarious results. With Leonard finally engaged to girl-across-the-hall Penny after countless proposals, the possibilities for happiness seem endless... while the probability for laughs is a foregone conclusion. What's unknown is how this might impact the ironclad "Roommate Agreement" he's entered into with Sheldon. Add to this, Sheldon's uncomfortably close relationship with neurobiologist Amy Farrah Fowler, Koothrappali's newfound ability to talk to and date women, and Howard and Bernadette's solution to an in-house caretaker (Stuart Bloom) for the always outspoken Mrs. Wolowitz, and the worlds of science and sitcom are about to hilariously collide!