Robot: Danger, Will Robinson! Danger.
Dr. Smith: Oh, the pain, the pain.
Robot: My micromechanism thanks you, my computer tapes thank you, and I thank you.
IDAK Alpha 12: Crush! Kill! Destroy!
Will Robinson: This is the Jupiter 2, identify yourself, please.
Other mistake: In one of the opening scenes with Will and Dr Smith, the Robot's power pack is clearly missing.
The Great Vegetable Rebellion - S3-E23
Trivia: Due to their uncontrollable laughter during filming of the infamous "Vegetable Rebellion" episode, Guy Williams and June Lockhart were written out of the next two episodes.