The Big Bang Theory finale: Jim Parsons, Johnny Galecki and Kunal Nayyar bid adieu to the apartment 4A in this heartwarming post

The Big bang Theory is in its 12th and the final season. The actors experienced an emotional meltdown as they tapped for the last episode of the series. BBT starred Jim Parsons as Sheldon Cooper, Johnny Galecki as Leonard Hofstadter, Kaley Cuoco as Penny, Simon Helberg as Howard Wolowitz, Kunal Nayyar as Rajesh Koothrappali, Melissa Raunch as Bernadette Rostenkowski and Mayim Bialik as Amy Farrah Fowler