Warning! Spoilers ahead for Young Sheldon.
When Young Sheldon premiered in 2017, CBS took the opportunity to introduce the character. He's actually one of only two characters mentioned that didn't have an older counterpart in The Big Bang Theory—the other being George.Despite this, Sheldon mentioned Billy a few times throughout the nerd-centric sitcom's run, and the prequel is taking the opportunity to finally visualize some of those stories. So far, Young Sheldon has sporadically used the
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