Sheldons popularity meant that it would have been impossible to imagine the series without him.

However, that is exactly whatThe Big Bang Theorys charactersattempted in one Christmas episode.

However, Sheldon did end up appearing throughout the episode despite its premise.

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If he hadnt, this would have been the only episode of the entire shows run without the character.

As such, there was no more competition for the shows primary focus.

Surprisingly, Penny missed a few season 4 outings due to Kaley Cuocos horse-riding injury.

Jim Parsons as Sheldon Cooper in the center with The Big Bang Theory’s other characters gathered by a Christmas tree in

Kaley Cuoco as Penny making a move on Jim Parsons as Sheldon in The Big Bang Theory episode “The Cooper Extraction."

Simon Helberg’s Howard, Melissa Rauch’s Bernadette, Mayim Bialik’s Amy, and Jim Parsons' Sheldon sit and talk on a couch in The Big Bang Theory: The Holiday Summation

The Big Bang Theory