Arthur Jeffries, Ph.
—a.k.a. Professor Proton— was a former children's science show host who's hired by Sheldon and Leonard to entertain them. Professor Proton was known for demonstrating scientific principles using everyday objects.
Is Professor Proton still alive?
That's right: Professor Proton is dead. ... His death was a stunning blow for the guys, made even worse by the fact that his funeral coincided with "Star Wars" Day, May the Fourth (Be With You).
Is Bob Newhart really Professor Proton?
Among those esteemed guest stars was comedy legend Bob Newhart, who appeared as one of Sheldon's childhood science heroes, Arthur Jeffries, a.k.a. Professor Proton, a few times over the course of the series. ... I was doing Newhart and he was doing Roseanne or Cybill.
