WATCH: “Big Bang Theory” Prequel Series “Young Sheldon” Trailer Ottawa, ON, Canada / JUMP! 106.9 Gord St. Denis May 18, 2017 06:38 am CBS has dropped the five-minute trailer for their spin-off to The Big Bang Theory. As you can see, unlike The Big Bang Theory, it’s not filmed in front of a studio audience. It airs in September. Check it out!!!