After making a deal with the Time Merchant, Dr. Smith returns to earth just before the launch of the Jupiter II. If he doesn't get on it the Jupiter II will crash into an asteroid.
Did You Know?
The robot was never verbally named on-screen. Irwin Allen
reputedly liked Rodney as its moniker, whilst an intriguing hint can be seen in "The Time Merchant", where the Robot's shipping crate is stamped "General Utility Non-Theorizing Environmental ROBOT" (capitals highlighted in red) suggesting that the machine's name was Gunter. It referred to itself with the above title (adding "Control" before Robot) during the second season. See more
With the alarm sounding at the launch pad, when the guards run past the robot, he is shown hidden behind a blue sheet. In the next camera shot close-up, the robot is covered with a black sheet & a blue sheet. See more
[Chasing Smith around a chair
There is no time for playing games, I advise you to come peacefully.
Dr. Zachary Smith
[Keeping chair between Robot and himself
You'll never take me alive!
Your condition is unimportant, you must be on that ship at blast off!