9. Buzz Aldrin
Source: Twitter @isabellangelita/ CBS
In season 6, a fake video of Aldrin taunting children is used to passive aggressively tell Howard that no one cares about his space exploits. He’s so hilariously mean in it. “What have you done?”
10. Wil Wheaton
Source: Twitter @Jesse_Creates
Another Star Trek alum to appear on the show, I love the “relationship” between Wil and Sheldon, AKA enemies. Their interactions crack me up.
11. James Earl Jones
Source: Twitter @TheStarWarsSaga/ CBS
I really love this episode. Sheldon lucks out and spends a night on the town with James Earl Jones. They get into all kinds of shenanigans before Jones eventually takes all of Sheldon’s friends to Comic-Con.