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Former TV star Bob Newhart will appear in a guest role on the popular CBS comedy 鈥淭he Big Bang Theory,鈥� according to a report by the website TVLine.

Newhart will portray Professor Proton, a TV science personality who hosted a children鈥檚 show. 鈥淏ang鈥� characters Sheldon (Jim Parsons) and Leonard (Johnny Galecki) were big fans of the show, according to producers Bill Prady and Steven Molaro, and when Sheldon discovers the professor can be hired to appear at events, he books Newhart鈥檚 character to come to their apartment.聽

鈥淲e're really excited about it,鈥� Molaro said during the show鈥檚 PaleyFest panel, according to NBC.

Newhart will appear on the May 2 episode of the CBS comedy.

The last time the actor appeared on television was 2005, when he had a guest-starring role on the ABC dramedy 鈥淒esperate Housewives.鈥� Newhart is best-known for the TV shows 鈥淭he Bob Newhart Show,鈥� which aired from 1972 to 1978 and focused on Newhart as a psychologist living in Chicago, and 鈥淣ewhart,鈥� which ran from 1982 to 1990 and featured the actor as the owner of an inn in Vermont with an eccentric staff. 鈥淣ewhart鈥� went down in television history after it aired its series finale in which Newhart woke up in bed and looked over to see actress Suzanne Pleshette, who played the actor鈥檚 wife on 鈥淭he Bob Newhart Show,鈥� and Newhart described a dream he had had to her in which he ran an inn in Vermont.

More recently, Newhart appeared in the 2003 Will Ferrell comedy 鈥淓lf鈥� and the 2011 comedy 鈥淗orrible Bosses.鈥�

鈥淭he Big Bang Theory鈥� is currently airing its sixth season, with its seventh season already having been renewed, and centers on a group of scientists and their respective girlfriends and wives. New episodes regularly win the night for ratings for the show鈥檚 network, CBS.