‘Young Sheldon’ Is the Anti-‘Big Bang Theory.’ That’s Why It’s Great.

‘Young Sheldon’ Is the Anti-‘Big Bang Theory.’ That’s Why It’s Great.

Old Sheldon, Jim Parsons, and young Sheldon, Iain Armitage, discuss the making of CBS’ most unusual and unexpected series: a ‘Big Bang’ spin-off that’s nothing like ‘Big Bang.’