On Young Sheldon, Billy Gardell will play a character by the name of Herschel Sparks, who is the father of Sheldon’s childhood nemesis Billy Sparks.
EW reports that the role of Herschel Sparks will be guest-starring, so we can’t say just how much of Billy Gardell we’ll see.
The pilot episode of Young Sheldon featured Billy Sparks terrorizing poor Sheldon with his pet chicken Matilda, and it seemed to be a regular occurrence.
In fact, I wouldn’t be shocked if he encourages Billy’s behavior.