Isabel May as Veronica Duncan
Isabel May plays Veronica Duncan on Young Sheldon, a popular and "easy" girl who goes through a "Sin House" on Halloween and becomes a devout Christian. Georgie is obsessed with her and often does anything he can to be close to her.
Casey Sander as Mike Rostenkowski
Casey Sander played Mike Rostenkowski, Bernadette's father and a no-frills retired policeman. Mike loved his daughter, but he often bullied everyone else and was rude to everyone around him. Howard and Mike didn't always see eye to eye, but they got along well enough.