The Big Bang Theory | S12E15 | Best of Leonard, Penny and Sheldon

The Big Bang Theory A woman who moves into an apartment across the hall from two brilliant but socially awkward physicists shows them how little they know about life outside of the laboratory. Creators: Chuck Lorre, Bill Prady Stars: Kaley Cuoco, Johnny Galecki, Jim Parsons, Simon Helberg, Kunal Nayyar, Melissa Rauch, Mayim Bialik S12E15 | Best of Leonard, Penny, and Sheldon Penny tries to throw a wrench into Leonard’s plan to be a sperm donor for her ex-boyfriend; Wolowitz, Bernadette, Anu, and Koothrappali turn Koothrappali’s canceled bachelor party into a couple’s trip aboard the “vomit comet.“