Stephen Hawking as Himself
From 2012 to 2017, the brilliant Stephen Hawking appeared in seven episodes. And Sheldon was finally able to meet his hero, by any means necessary. His episodes are certainly ones to remember.
Hawking’s scientific works have left a lasting mark on world theories, but we don’t need to tell you that.
Dean Norris as Colonel Richard Williams
56 year old Dean Norris has starred in some great films such as Lethal Weapon 2, Total Recall, Terminator 2: Judgment Day, and Evan Almighty to name a few.
Although he’s best recognized as DEA agent Hank Schrader from Breaking Bad and town councilman “Big Jim” Rennie on Under the Dome. Norris appeared in six episodes as Colonel Richard Williams on TBBT.