High Quality Content by WIKIPEDIA articles! Jonathan Harris (born Jonathan Charasuchin; November 6, 1914 – November 3, 2002) was an American stage and film 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, in the 1960s sci-fi 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.