narrator of the series about how his character sheldon from "the big bang theory" became the nerdy supergenius"young sheldon" is already in high school at the age of 9. >> we reference sod many things in his past. the more we talked about it we realized there's pomt we created a treasure drove of information. >> high school is a haven for higher learning. >> you may recognize the young actor -- he's 8-year-old iain armitage. he played shailene woodley's son ziggy on the hbo hit "big little lies." jim and iain are already bonding, the two took in a broadway musical together last week. >> you have a bit of mustache. follow him through his eyes. what's like it. the world around him >> sheldon cooper's mom mary on "the big bang theory" is played by laurie metcalf. her real-life daughter is "scandal's" zoe perry, and she's playing young sheldon's mom on the new series, the resemblance is striking. >> i got to go on youtube and remind myself, you know, what dialect she was using. a natural gestures and sound come out of me anyway. >> everybody excited to start school on monday. >> i am. >>> look who

the narrator of the series about how his character sheldon from "the big bang theory" became a nerdy supergenius" is already in high school at the age of 9. >> there's something about ian that popped jim and ian are already bonding. >> what advice did jim give you? >> say this line differently. he would say don't smile. >> don't smile. >> i know you want to smile and be nice to be people. don't. don't do that any more. >> sheldon cooper's mom mary on "the big bang theory" is played by laurie metcalf. her real-life daughter is "scandal's" zoe perry, and she's playing young sheldon's mom on the new series, the resemblance is striking. >> it's a hire higher learning. >> show. she march moore. >>> so i got a year off and i got to kind of chill and play with my dogs. then all of a sudden, god, karma, the universe, hollywood said, hey, enough sitting in your backyard we got something for you. >> a lead role on the '70s show "s.w.a.t." >> take care of business, fellas. >> after 11 seasons on "criminal minds," shemar is now taking care of business as hondo, a sergeant on the streets of l.a. they can exp