Given that The Big Bang Theory aired 279 episodes during 12 seasons, it only makes sense that strict rules needed to be followed behind the scenes in order for things to run smoothly. As we're going to reveal in the following, that was especially the case when it came to the production of the show and lines written by the writers for the cast. Some sitcoms were open to changing lines such as Friends, however, that wasn't the case with The Big Bang Theory, and we're going to reveal why.

In addition, it seems like the showrunners were very sensitive when it came to the look of their characters, particularly the main four guys, Sheldon, Leonard, Howard and Raj.

We'll take a look at a key rule the four were following throughout the series. In addition, we'll reveal a request Johnny Galecki pitched for the appearance of his character Leonard on the show, and how he was able to get the okay for it despite initial pushback from those behind the scenes.

Sticking To The Script And Avoiding Improv Was A Key Rule Behind The Scenes Given How Tight The Shoot Schedule Was

In the past, sitcoms used brilliant improv moments to fulfill certain scenes. That was the case on Friends, as the directors behind the scenes would modify scenes based on the audience's reaction. However, that was not the case on The Big Bang Theory. There were the odd moments of improvisation that were kept in, but for the most part, sticking to the script was necessary.

Simon Helberg revealed that it wasn't necessary to use his improv chops given the strength of the writing team.

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