Professor Robinson, after being trapped in a cave over night seems to come under the spell of an alien entity. The alien is desperate to leave the planet and guides the professor through the repair process. But others see the change, and question the mental health of John Robinson. Will they manage to save the professors humanity, or will he be successful killing all those who threaten his plan. Written by
Did You Know?
This episode exists with two different cliffhangers at the end. One is in black and white and is the segue for Lost in Space: Attack of the Monster Plants
(1965), which began the first season repeat cycle during the series' initial run on CBS. The other is in color and is the segue for Lost in Space: Blast Off Into Space
(1966), the first episode of the second season, which is in color. In syndication, the black and white version was used for many years, even though "Blast" usually followed "Follow" in repeat airings on local stations. The color version is used in the DVD release and during current (2013) airings on MeTV. See more
When the alien Canto approaches the Jupiter 2, the robot alerts Will that he is coming. As Canto walks toward them, his shadow can be seen on the artificial background scenery. See more