Chuck Lorre faced a major challenge while planning episodes of The Big Bang Theory, striking a balance between comedy and science. This was revealed by Lorre himself in 2008 when the show was starting. David Saltzberg's role as a consultant on the show was crucial in ensuring scientific accuracy, as he proofread the scripts for several years, even while stationed in Antarctica. Jim Parsons, who played Sheldon, found it challenging to attach emotions to the complex scientific dialogue he had to deliver. Despite these hurdles, Parsons succeeded at portraying the character consistently for 12 seasons on the show.