Jonathan Harris (born Jonathan Charasuchin; November 6, 1914 – November 3, 2002) was an American character actor. Two of his best-known roles were as the timid accountant Bradford Webster in the TV version of The Third Man and the comic villain Dr. Zachary Smith of the 1960s science fiction television series Lost in Space. Near the end of his career, he provided the voice of “Manny”, a praying mantis in the animated feature A Bug’s Life.
Jonathan Harris Wikipedia article.