What can you say about Bob Newhart that hasn't been written a million times over? He's a TV legend, with two classic sitcoms (The Bob Newhart Show and Newhart) on his resume. He's also a stand-up comedy legend, who left a humble accounting career to win a Grammy with his first comedy album, The Button-Down Mind of Bob Newhart, in 1960. He still tours today, and has been seen on both the big and small screens in a number of projects (Legally Blonde, Elf, ER).

On Sunday at 8 PM ET, he co-stars in The Librarian: Curse of the Judas Chalice, the third in the Librarian series that has become a nice little franchise for TNT. He plays Judson, who acts as a guide and mentor to Noah Wyle's character of Flynn Carsen, a librarian who acts more like Indiana Jones than the person who stamps the insides of new books.

I spoke to Newhart by phone last week; we discussed the movie, shooting in New Orleans, his recent penchant for memorable supporting roles, and if he thinks the multi-camera sitcom has a future.