The opening cast shot always features the series' regulars enjoying dinner together.
The opening cast credits cast shot in seasons two through four, for instance, depict Howard, Raj, Leonard, Penny, and Sheldon.
Amy and Bernadette were added to the shot starting in season six, even though both had been regulars on the show since season four.
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Things You Didn't Know About The Big Bang Theory
FanfictionHere are some mind-blowing facts that you probably didn't know about The Big Bang Theory.