As fans will remember, Arthur Jeffries died way back in Season 7, and The Big Bang Theory isn’t exactly a show in the habit of incorporating ghosts.
Nevertheless, The Big Bang Theory has found a way to bring Sheldon’s idol back in the years since his death, and in the most Sheldon-like way imaginable.
Arthur has come to visit Sheldon in his dreams, dressed as Obi-Wan Kenobi and carrying a light saber.
It’s not quite a twist as epic as the one Bob Newhart pulled on his own show years ago, but it was a solid way to bring him back to the show without resurrecting the character.