Playing the titular character, Dr. Bob Hartley, turned out to be just one major stage in the career of comedian Bob Newhart, who later headlined three more shows.
After the series wrapped, he starred in "Newhart," "Bob," and "George and Leo." Newhart continues to act, most recently appearing in "Young Sheldon" as Professor Proton.
His most prolific work has been in television, where he directed dozens of episodes of "Murphy Brown" as well as plenty of "Friends," "Home Improvement," "Wings," "ALF," and more.