During the filming of the final episode of The Big Bang Theory, emotions were high for the cast as they had to bid farewell to the show after 12 seasons.
One particular scene that had Jim Parsons, who played Sheldon Cooper, emotional was when he acknowledged his friend Howard as an astronaut during his Nobel Prize speech. This unscripted moment left Parsons almost in tears and true fans of the show picked up on the subtle yet beautiful moment. Despite the show's tight script, the cast created several memorable moments of their own throughout the series.