In January 1965, the pilot episode, "No Place To Hide", was filmed, largely in the Mohave Desert. CBS network executives, as well as story editor Tony Wilson, thought that the series needed another cast member - - a 'troublemaker' character, who would create conflict and thus be the catalyst for new stories.
The character of Dr. Smith was thus created to be this troublemaker. And hey, as long as we're tinkering with the cast, let's add a cool- looking robot to the crew. It's a science-fiction show, after all, and every good sci-fi series ought to have a robot, shouldn't it?
Four of the first five episodes -- The Reluctant Stowaway, Island in the Sky, There Were Giants in the Earth, The Hungry Sea -- were created by intercutting footage from the original pilot episode with newly-filmed scenes featuring Dr. Smith and the robot.
But "The Derelict" is unusual in that it was written so as to take advantage of an existing film set from "Fantastic Voyage", a major motion picture that was being filmed at Twentieth Century Fox studios in mid-1965, at the same time that Lost In Space was being filmed at the same studio.
This is one of the finest examples of the cost-conscious nature of producer Irwin Allen. Some have called him 'cheap' -- and he was -- but it was a great idea to re-use the Brain Set from "Fantastic Voyage" as the interior of the derelict spacecraft. Under-lit and seen mostly in shadow, the Brain Set made for a wonderfully creepy set for this episode, and was probably a more-expensive set than this series would normally have been able to afford.
The character of Dr. Smith was thus created to be this troublemaker. And hey, as long as we're tinkering with the cast, let's add a cool- looking robot to the crew. It's a science-fiction show, after all, and every good sci-fi series ought to have a robot, shouldn't it?
Four of the first five episodes -- The Reluctant Stowaway, Island in the Sky, There Were Giants in the Earth, The Hungry Sea -- were created by intercutting footage from the original pilot episode with newly-filmed scenes featuring Dr. Smith and the robot.
But "The Derelict" is unusual in that it was written so as to take advantage of an existing film set from "Fantastic Voyage", a major motion picture that was being filmed at Twentieth Century Fox studios in mid-1965, at the same time that Lost In Space was being filmed at the same studio.
This is one of the finest examples of the cost-conscious nature of producer Irwin Allen. Some have called him 'cheap' -- and he was -- but it was a great idea to re-use the Brain Set from "Fantastic Voyage" as the interior of the derelict spacecraft. Under-lit and seen mostly in shadow, the Brain Set made for a wonderfully creepy set for this episode, and was probably a more-expensive set than this series would normally have been able to afford.