Bob Newhart has booked a return visit to The Big Bang Theory, EW has learned.
Newhart will reprise his role as Sheldon’s (Jim Parsons) childhood hero Arthur Jefferies, a.k.a Professor Proton, a former Bill Nye-type host of a scientific TV show, in the Nov. 2 episode.
Though Arthur died in season 7, he subsequently returned twice as a ghostly Jedi apparition in Sheldon’s dreams, which is exactly how he’ll return in season 11, appearing to Sheldon in another time of need. Wil Wheaton will also reprise his role as Sheldon’s on and off again nemesis in that same episode.
The veteran Newhart star first appeared in the sixth season of the CBS comedy, earning the legendary actor his very first Primetime Emmy Award.
The Big Bang Theory airs Mondays at 8 p.m. ET before moving to its returning Thursday timeslot on Nov. 2 at 8 p.m. ET on CBS.