LOS ANGELES, Oct. 3 (UPI) --
U.S. actor and comedian Bob Newhart
is to return to "The Big Bang Theory" in his Emmy Award-winning role of Professor Proton, CBS announced.
Bill Nye "The Science Guy" is also to appear in the Nov. 7 episode of the sitcom.
"When Professor Proton contacts Leonard to ask for help with an experiment, a scorned Sheldon seeks revenge by befriending a rival science TV host, Bill Nye," a synopsis said.
Johnny Galecki plays Leonard and Jim Parsons plays Sheldon.
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