Life ‘Big Bang Theory’ cast then and now: Johnny Galecki, Kaley Cuoco, Jim Parsons, Mayim Bialik and more May 3, 2019May 16, 2019 USA TODAY Comments Off on ‘Big Bang Theory’ cast then and now: Johnny Galecki, Kaley Cuoco, Jim Parsons, Mayim Bialik and more "The Big Bang Theory" is ending on May 16 after 12 seasons. We're looking back at each cast member's transformation over the years.
