- Sheldon has a scientific breakthrough at the dentist's office. Also, Dale (Craig T. Nelson) and Meemaw go to the casino, and Georgie makes a big mistake when Dale leaves him in charge of the store.
- First Aired: April 16, 2020 - 19 Minutes Runtime
- Iain Armitage, Zoe Perry, Lance Barber, Montana Jordan
Watch Young Sheldon Season 3 Episode 20 - A Baby Tooth and the Egyptian God of Knowledge
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Season 3 Episode 20 - Video Clips & Extras
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Young Sheldon, Season 3 Episode 20, is available to watch and stream on CBS. You can also buy, rent Young Sheldon on demand at HBO Max, Amazon, Vudu, Microsoft Movies & TV, Google Play, iTunes online.