1991–2012: Established career thumb|upright|left|In Norfolk, Virginia, In addition to stand-up comedy, Newhart became a dedicated character actor in film and television. Newhart played a beleaguered school principal in In & Out (1997), acted in the Will Ferrell Christmas comedy film Elf (2003), and made a cameo appearance as a sadistic but appreciative CEO at the end of the comedy Horrible Bosses (2011). He appeared on It's Garry Shandling's Show and Committed, reprised his role as Dr. Bob Hartley on Murphy Brown, and appeared as himself on The Simpsons. Newhart had a role on NCIS as Ducky's mentor and predecessor, a retired forensic pathologist, who was discovered to have Alzheimer's disease.
1991–2012: Established career thumb|upright|left|In Norfolk Virginia, In addition to stand-up comedy, Newhart became a dedicated character actor in film and television. Newhart played a beleaguered school principal in In & Out (1997), acted in the Will Ferrell Christmas comedy film Elf (2003), and made a cameo appearance as a sadistic but appreciative CEO at the end of the comedy Horrible Bosses (2011). He appeared on It's Garry Shandling's Show and Committed, reprised his role as Dr. Bob Hartley on Murphy Brown, and appeared as himself on The Simpsons. Newhart had a role on NCIS as Ducky's mentor and predecessor, a retired forensic pathologist, who was discovered to have Alzheimer's disease.