Jonathan Harris was an American character actor whose career included more than 500 television and film appearances, as well as voiceovers. Two of his best-known roles were as the timid accountant Bradford Webster in the television version of The Third Man and the fussy villain Dr. Zachary Smith of the 1960s science-fiction series Lost in Space. Near the end of his career, he provided voices for the animated features A Bug's Life and Toy Story 2.

Lost in Space is an American science fiction television series, created and produced by Irwin Allen, which originally aired between 1965 and 1968 on CBS. The series was inspired by the 1812 Johann David Wyss novel The Swiss Family Robinson. The series follows the adventures of the Robinsons, a pioneering family of space colonists who struggle to survive in the depths of space. The show ran for 83 episodes over three seasons. The first season comprised 29 one hour episodes, filmed in black and white. Seasons 2 and 3 episodes were shot in color.