The cast of 'The Big Bang Theory' sits down with Stephen after the series finale of their iconic show to talk about their first impressions of each other and their last group scene together. Featuring Jim Parsons, Johnny Galecki, Kaley Cuoco, Kunal Nayyar, Mayim Bialik, Melissa Rauch, and Simon Helberg.

To view video on YouTube, [The Late Show with Stephen Colbert .]

Stephen asks the cast of 'The Big Bang Theory' questions that they anonymously submitted for each other, like: how did Kaley Cuoco learn her lines if she was never seen looking at her script?!  

To view video on YouTube, [The Late Show with Stephen Colbert .]
Watch The Late Show with Stephen Colbert weeknights at 11:35 p.m.