The actor played Raj Koothrappali in the hit sitcom, which ran for a total of 12 seasons.
Nayyar appeared on Sunday Brunch on January 30 to discuss his role in the new series Doubt.
During the interview, when talking about The Big Bang Theoryhost Tim Lovejoy asked Nayyar how they made the footage showing the characters going up and down the stairs in their high-rise apartment.
Nayyar surprised Lovejoy by telling him stairs lead nowhere, adding: “How it works, you go downstairs, and then they scream, ‘Hold on’.
He continued: “They change the scene like if the apartment says 1a then suddenly say 2a or 3. They change the scene so it looks exactly like another floor.”
Nayyar later said that the stars of the show would have to stay in place while the series was changed. They will then have to repeat what they just did to create the illusion of going down many stairs.
“You run back up the stairs, getting nowhere, and then you walk back up as if it were a new floor,” he said.
When Lovejoy was unable to find out the details, Nayyar explained: “Nothing at all. There’s a wall there where Johnny Galecki will, in 12 years, stick his gum in. I’m not joking.”
He quips: “So if any of you are a Johnny Galecki fan and you want his dry gum, I’m sure it’s for sale somewhere on the internet. Welcome to Hollywood. ”
Doubt arrives on Apple TV+ on February 4.
https://www.independent.co.uk/arts-entertainment/tv/news/kunal-nayyar-raj-big-bang-theory-set-b2004520.html Big Bang Theory star Kunal Nayyar clears up confusion about behind-the-scenes details