'The Big Bang Theory': Professor Proton returns to tell Sheldon some rules of marriage
Bob Newhart returns as Professor Proton to offers words of wisdom to Sheldon on how to navigate the married life
There is trouble in Sheldon and Amy's paradise of marriage, and Thursday's episode of 'The Big Bang Theory' saw Professor Proton returning to give Sheldon some marital advice.
Of course, he paid a visit in Sheldon's dream, being dead for many years. But Sheldon's beloved childhood hero, played by the acerbicly charming Bob Newhart, is still on his mind, from where he pops up and offers words of wisdom whenever Sheldon finds himself in trouble.
During their reunion after a long time, we see Sheldon sitting with his favorite "ghost" in a delicatessen on planet Dagobah. Professor Proton is wearing his Jedi robes and looks visibly unhappy with his order.