[s3e20] A Baby Tooth And The Egyptian God Of Kn... -

The episode features a cameo from Stephen Hawking , using his iconic voice modulator superimposed over a poster in Sheldon's room.

The episode parodies the famous 1980s "This is your brain on drugs" anti-drug commercial when Sheldon describes his chamomile-induced state. The Role of Thoth [S3E20] A Baby Tooth and the Egyptian God of Kn...

This is notably the first and only episode in the entire series where George Sr. (Sheldon's father) does not appear. The episode features a cameo from Stephen Hawking

In his dream, Sheldon asks Thoth how to unify the four fundamental forces of the universe (the Unified Field Theory ). Thoth begins to explain, but Sheldon wakes up before he can hear the answer. (Sheldon's father) does not appear

Desperate to reclaim the lost knowledge, Sheldon tries to recreate the dream by drinking highly concentrated chamomile tea . This leads to a hallucination w

The episode reveals Dale’s darker side; despite Georgie paying back the stolen money from his own savings, Dale fires him as "revenge by proxy" because Meemaw rejected his marriage proposal. Production Highlights & Trivia